/********************************************************************
 *	Kalendae, a framework agnostic javascript date picker           *
 *	Copyright(c) 2013-2017 Jocelyn Badgley (joc@twipped.com)        *
 *	http://github.com/Twipped/Kalendae                              *
 *	Version 0.7.1                                                   *
 ********************************************************************/
(function (undefined) {

  (function (factory) {
    if (typeof define === 'function' && define.amd) {
      // AMD. Register as an anonymous module.
      define([], factory);
    } else if (typeof exports === 'object') {
      // Node/CommonJS
      module.exports = factory();
    } else {
      // Browser globals
      window.Kalendae = factory();
    }
  }(function () {

    var moment;
    var getTodayYearDate = function () {
      return Kalendae.moment().startOf('day').yearDay();
    };

    var Kalendae = function (targetElement, options) {
      if (typeof document.addEventListener !== 'function' && !util.isIE8()) return;

      //if the first argument isn't an element and isn't a string, assume that it is the options object
      var is_element = false;
      try {
        is_element = targetElement instanceof Element;
      }
      catch (err) {
        is_element = !!targetElement && is_element.nodeType === 1;
      }
      if (!(is_element || typeof (targetElement) === 'string')) options = targetElement;

      var self = this,
        classes = self.classes,
        opts = self.settings = util.merge(self.defaults, { attachTo: targetElement }, options || {}),
        $container = self.container = util.make('div', { 'class': classes.container }),
        calendars = self.calendars = [],
        startDay = moment().day(opts.weekStart),
        vsd, ved,
        columnHeaders = [],
        $cal,
        $title,
        $caption,
        $header,
        $days, $week, dayNodes = [],
        $span,
        i = 0,
        j = opts.months;

      if (util.isIE8()) util.addClassName($container, 'ie8');

      //generate the column headers (Su, Mo, Tu, etc)
      i = 7;
      while (i--) {
        columnHeaders.push(startDay.format(opts.columnHeaderFormat));
        startDay.add(1, 'days');
      }

      //setup publish/subscribe and apply any subscriptions passed in settings
      MinPubSub(self);
      if (typeof opts.subscribe === 'object') {
        for (i in opts.subscribe) if (opts.subscribe.hasOwnProperty(i)) {
          self.subscribe(i, opts.subscribe[i]);
        }
      }

      //set the view month
      if (!!opts.viewStartDate) {
        vsd = moment(opts.viewStartDate, opts.format);
      } else {
        vsd = moment();
      }
      self.viewStartDate = vsd.date(1);

      //set the end range
      if (!!opts.endDate) {
        ved = moment(opts.endDate, opts.format);
        self.endDate = ved;
      }

      //process default selected dates
      self._sel = [];
      if (!!opts.selected) {
        self.setSelected(opts.selected, false);
        self.viewStartDate = moment(self._sel[0]);
      }

      var viewDelta = ({
        'past': opts.months - 1,
        'today-past': opts.months - 1,
        'any': opts.months > 2 ? Math.floor(opts.months / 2) : 0,
        'today-future': 0,
        'future': 0
      })[this.settings.direction];


      if (viewDelta && moment().month() == moment(self.viewStartDate).month()) {
        self.viewStartDate = moment(self.viewStartDate).subtract({ M: viewDelta }).date(1);
      }

      // store the view that the calendar initialized with in-case we want to reset.
      self.defaultView = moment(self.viewStartDate);

      if (typeof opts.blackout === 'function') {
        self.blackout = opts.blackout;
      } else if (!!opts.blackout) {
        var bdates = parseDates(opts.blackout, opts.parseSplitDelimiter, opts.format);
        self.blackout = function (input) {
          input = moment(input).startOf('day').yearDay();
          if (input < 1 || !self._sel) return false;
          var i = bdates.length;
          while (i--) if (bdates[i].startOf('day').yearDay() === input) return true;
          return false;
        };
      } else {
        self.blackout = function () { return false; };
      }


      self.direction = self.directions[opts.direction] ? self.directions[opts.direction] : self.directions['any'];


      //for the total months setting, generate N calendar views and add them to the container
      j = Math.max(opts.months, 1);
      while (j--) {
        $cal = util.make('div', { 'class': classes.calendar }, $container);

        $cal.setAttribute('data-cal-index', j);
        if (opts.months > 1) {
          if (j == Math.max(opts.months - 1, 1)) util.addClassName($cal, classes.monthFirst);
          else if (j === 0) util.addClassName($cal, classes.monthLast);
          else util.addClassName($cal, classes.monthMiddle);
        }

        //title bar
        $title = util.make('div', { 'class': classes.title }, $cal);
        if (!opts.useYearNav) {
          util.addClassName($title, classes.disableYearNav);
        }
        util.make('a', { 'class': classes.previousYear }, $title);           //previous button
        util.make('a', { 'class': classes.previousMonth }, $title);          //previous button
        util.make('a', { 'class': classes.nextYear }, $title);               //next button
        util.make('a', { 'class': classes.nextMonth }, $title);              //next button
        $caption = util.make('div', { 'class': classes.caption }, $title);  //title caption
        util.make('div', { 'class': classes.captionMonth }, $caption);          //month text
        util.make('div', { 'class': classes.captionYear }, $caption);           //year text

        //column headers
        $header = util.make('div', { 'class': classes.header + ' ' + (opts.dayHeaderClickable == true ? classes.dayActive : '') }, $cal);
        i = 0;
        do {
          $span = util.make('span', { 'data-day': i }, $header);

          if (opts.dayHeaderClickable == true && opts.mode == 'multiple') {
            $span.addEventListener("mouseover", function (e) {
              var daysContainer = e.target.parentNode.nextSibling;
              daysToHover = daysContainer.getElementsByClassName('k-day-week-' + e.target.getAttribute('data-day'));
              if (daysToHover.length > 0) {
                for (var i = 0; i < daysToHover.length; i++) {
                  if (util.hasClassName(daysToHover[i], classes.dayActive)) util.addClassName(daysToHover[i], 'k-day-hover-active');
                }
              }
            });
            $span.addEventListener("mouseleave", function (e) {
              var daysContainer = e.target.parentNode.nextSibling;
              daysToHover = daysContainer.getElementsByClassName('k-day-week-' + e.target.getAttribute('data-day'));
              if (daysToHover.length > 0) {
                for (var i = 0; i < daysToHover.length; i++) {
                  if (util.hasClassName(daysToHover[i], classes.dayActive)) util.removeClassName(daysToHover[i], 'k-day-hover-active');
                }
              }
            });
          }
          $span.innerHTML = columnHeaders[i];
        } while (++i < 7);

        //individual day cells
        $days = util.make('div', { 'class': classes.days }, $cal);
        i = 0;
        dayNodes = [];
        do {
          if (opts.mode == 'week') {
            if ((i % 7) === 0) {
              $week = util.make('div', { 'class': classes.week + ' clearfix' }, $days);
              dayNodes.push($week);
            }
            util.make('span', {}, $week);
          } else {
            dayNodes.push(util.make('span', {}, $days));
          }
        } while (++i < 42);

        //store each calendar view for easy redrawing
        calendars.push({
          header: $header,
          caption: $caption,
          days: dayNodes
        });

        if (j) util.make('div', { 'class': classes.monthSeparator }, $container);
      }

      self.draw();

      util.addEvent($container, 'mousedown', function (event, target) {
        var clickedDate;
        if (util.hasClassName(target, classes.nextMonth)) {
          //NEXT MONTH BUTTON
          if (!self.disableNextMonth && self.publish('view-changed', self, ['next-month']) !== false) {
            self.viewStartDate.add(1, 'months');
            self.draw();
          }
          return false;

        } else if (util.hasClassName(target, classes.previousMonth)) {
          //PREVIOUS MONTH BUTTON
          if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-month']) !== false) {
            self.viewStartDate.subtract(1, 'months');
            self.draw();
          }
          return false;

        } else if (util.hasClassName(target, classes.nextYear)) {
          //NEXT MONTH BUTTON
          if (!self.disableNextYear && self.publish('view-changed', self, ['next-year']) !== false) {
            self.viewStartDate.add(1, 'years');
            self.draw();
          }
          return false;

        } else if (util.hasClassName(target, classes.previousYear)) {
          //PREVIOUS MONTH BUTTON
          if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-year']) !== false) {
            self.viewStartDate.subtract(1, 'years');
            self.draw();
          }
          return false;

        } else if ((util.hasClassName(target.parentNode, classes.days) || util.hasClassName(target.parentNode, classes.week)) && util.hasClassName(target, classes.dayActive) && (clickedDate = target.getAttribute('data-date'))) {
          //DAY CLICK
          clickedDate = moment(clickedDate, opts.dayAttributeFormat).hours(12);
          if (self.publish('date-clicked', self, [clickedDate]) !== false) {

            switch (opts.mode) {
              case 'multiple':
                if (!self.addSelected(clickedDate)) self.removeSelected(clickedDate);
                break;
              case 'range':
                self.addSelected(clickedDate);
                break;
              case 'week':
                self.weekSelected(clickedDate);
                break;
              case 'single':
              /* falls through */
              default:
                self.addSelected(clickedDate);
                break;
            }

          }
          return false;

        } else if (util.hasClassName(target.parentNode, classes.week) && (clickedDate = target.getAttribute('data-date'))) {
          //INACTIVE WEEK CLICK
          clickedDate = moment(clickedDate, opts.dayAttributeFormat).hours(12);
          if (self.publish('date-clicked', self, [clickedDate]) !== false) {
            if (opts.mode == 'week') {
              self.weekSelected(clickedDate);
            }
          }
          return false;

        } else if (util.hasClassName(target.parentNode, classes.header)) {
          if (opts.mode == 'multiple' && opts.dayHeaderClickable == true) {
            var parentSelected = util.hasClassName(target, classes.daySelected),
              month = target.parentNode.parentNode.getAttribute('data-datestart'),
              dayToSelect = target.getAttribute('data-day');

            if (parentSelected == true) {
              self.monthDaySelected(month, dayToSelect, true);
            } else {
              self.monthDaySelected(month, dayToSelect, false);
            }
          }
          return false;
        }

        return false;
      });


      if (!!(opts.attachTo = util.$(opts.attachTo))) {
        opts.attachTo.appendChild($container);
      }

    };

    Kalendae.prototype = {
      defaults: {
        attachTo: null,            /* the element to attach the root container to. can be string or DOMElement */
        months: 1,               /* total number of months to display side by side */
        weekStart: 0,               /* day to use for the start of the week. 0 is Sunday */
        direction: 'any',           /* past, today-past, any, today-future, future */
        directionScrolling: true,            /* if a direction other than any is defined, prevent scrolling out of range */
        viewStartDate: null,            /* date in the month to display.  When multiple months, this is the left most */
        endDate: null,            /* date calendar cannot scroll or select past */
        blackout: null,            /* array of dates, or function to be passed a date */
        selected: null,            /* dates already selected.  can be string, date, or array of strings or dates. */
        mode: 'single',        /* single, multiple, range */
        dayOutOfMonthClickable: false,
        dayHeaderClickable: false,
        format: null,            /* string used for parsing dates. */
        subscribe: null,            /* object containing events to subscribe to */

        columnHeaderFormat: 'dd',            /* number of characters to show in the column headers */
        titleMonthFormat: 'MMMM,',         /* format mask for month titles. */
        titleYearFormat: 'YYYY',          /* format mask for year titles. */
        dayNumberFormat: 'D',             /* format mask for individual days */
        dayAttributeFormat: 'YYYY-MM-DD',    /* format mask for the data-date attribute set on every span */
        parseSplitDelimiter: /,\s*|\s+-\s+/, /* regex to use for splitting multiple dates from a passed string */
        rangeDelimiter: ' - ',           /* string to use between dates when outputting in range mode */
        multipleDelimiter: ', ',            /* string to use between dates when outputting in multiple mode */
        useYearNav: true,

        dateClassMap: {}
      },
      classes: {
        container: 'kalendae',
        calendar: 'k-calendar',
        monthFirst: 'k-first-month',
        monthMiddle: 'k-middle-month',
        monthLast: 'k-last-month',
        title: 'k-title',
        previousMonth: 'k-btn-previous-month',
        nextMonth: 'k-btn-next-month',
        previousYear: 'k-btn-previous-year',
        nextYear: 'k-btn-next-year',
        caption: 'k-caption',
        captionMonth: 'k-caption-month',
        captionYear: 'k-caption-year',
        header: 'k-header',
        days: 'k-days',
        week: 'k-week',
        dayOutOfMonth: 'k-out-of-month',
        dayInMonth: 'k-in-month',
        dayActive: 'k-active',
        daySelected: 'k-selected',
        dayInRange: 'k-range',
        dayInRangeStart: 'k-range-start',
        dayInRangeEnd: 'k-range-end',
        dayBlackout: 'k-blackout',
        dayToday: 'k-today',
        monthSeparator: 'k-separator',
        disablePreviousMonth: 'k-disable-previous-month-btn',
        disableNextMonth: 'k-disable-next-month-btn',
        disablePreviousYear: 'k-disable-previous-year-btn',
        disableNextYear: 'k-disable-next-year-btn',
        disableYearNav: 'k-disable-year-nav'
      },

      disablePreviousMonth: false,
      disableNextMonth: false,
      disablePreviousYear: false,
      disableNextYear: false,

      directions: {
        'past': function (date) { return moment(date).startOf('day').yearDay() >= getTodayYearDate(); },
        'today-past': function (date) { return moment(date).startOf('day').yearDay() > getTodayYearDate(); },
        'any': function (date) { return false; },
        'today-future': function (date) { return moment(date).startOf('day').yearDay() < getTodayYearDate(); },
        'future': function (date) { return moment(date).startOf('day').yearDay() <= getTodayYearDate(); }
      },

      getSelectedAsDates: function () {
        var out = [];
        var i = 0, c = this._sel.length;
        for (; i < c; i++) {
          out.push(this._sel[i].toDate());
        }
        return out;
      },

      getSelectedAsText: function (format) {
        var out = [];
        var i = 0, c = this._sel.length;
        for (; i < c; i++) {
          out.push(this._sel[i].format(format || this.settings.format || 'YYYY-MM-DD'));
        }
        return out;
      },

      getSelectedRaw: function () {
        var out = [];
        var i = 0, c = this._sel.length;
        for (; i < c; i++) {
          out.push(moment(this._sel[i]));
        }
        return out;
      },

      getSelected: function (format) {
        var sel = this.getSelectedAsText(format);
        switch (this.settings.mode) {
          case 'week':
          /* falls through range */

          case 'range':
            sel.splice(2); //shouldn't be more than two, but lets just make sure.
            return sel.join(this.settings.rangeDelimiter);

          case 'multiple':
            return sel.join(this.settings.multipleDelimiter);

          case 'single':
          /* falls through */
          default:
            return (sel[0] || null);
        }
      },

      isSelected: function (input) {
        input = moment(input).startOf('day').yearDay();
        if (input < 1 || !this._sel || this._sel.length < 1) return false;

        switch (this.settings.mode) {
          case 'week':
          /* falls through range */
          case 'range':
            var a = this._sel[0] ? this._sel[0].startOf('day').yearDay() : 0,
              b = this._sel[1] ? this._sel[1].startOf('day').yearDay() : 0;

            if (a === input || b === input) return 1;
            if (!a || !b) return 0;

            if ((input > a && input < b) || (a < b && input < a && input > b)) return -1;
            return false;

          case 'multiple':
            var i = this._sel.length;
            while (i--) {
              if (this._sel[i].startOf('day').yearDay() === input) {
                return true;
              }
            }
            return false;


          case 'single':
          /* falls through */
          default:
            return (this._sel[0] && (this._sel[0].startOf('day').yearDay() === input));
        }

        return false;
      },

      setSelected: function (input, draw) {
        var i,
          new_dates = parseDates(input, this.settings.parseSplitDelimiter, this.settings.format),
          old_dates = parseDates(this.getSelected(), this.settings.parseSplitDelimiter, this.settings.format);

        i = old_dates.length;
        while (i--) { this.removeSelected(old_dates[i], false); }

        i = new_dates.length;
        while (i--) { this.addSelected(new_dates[i], false); }

        if (draw !== false) {
          if (new_dates[0]) {
            this.viewStartDate = moment(new_dates[0], this.settings.format);
          }
          this.draw();
        }
      },

      addSelected: function (date, draw) {
        date = moment(date, this.settings.format).hours(12);

        if (!!this.endDate && date.isAfter(this.endDate, 'day')) return false; // safety for when it wasnt a click

        if (this.settings.dayOutOfMonthClickable && this.settings.mode !== 'range') { this.makeSelectedDateVisible(date); }

        switch (this.settings.mode) {
          case 'multiple':
            if (!this.isSelected(date)) this._sel.push(date);
            else return false;
            break;
          case 'range':

            if (this._sel.length !== 1) this._sel = [date];
            else {
              if (date.startOf('day').yearDay() > this._sel[0].startOf('day').yearDay()) this._sel[1] = date;
              else this._sel = [date, this._sel[0]];
            }
            break;
          case 'single':
          /* falls through */
          default:
            this._sel = [date];
            break;
        }
        this._sel.sort(function (a, b) { return a.startOf('day').yearDay() - b.startOf('day').yearDay(); });
        this.publish('change', this, [date]);
        if (draw !== false) this.draw();
        return true;
      },

      weekSelected: function (mom) {
        var x = mom.toDate();
        var start = moment(x).startOf('week');
        var end = moment(x).endOf('week').subtract(1, 'day');
        this._sel = [start, end];
        this.publish('change', this, [mom.day()]);
        this.draw();
      },

      monthDaySelected: function (month, daynumber, unselected) {
        var days = moment(month).startOf('month').weekday(daynumber),
          endMonth = moment(month).endOf('month');
        selected = [];

        while (days <= endMonth) {
          if (days >= moment(month).startOf('month') && !this.direction(days)) {
            if (unselected) {
              this.removeSelected(moment(days).hours(12));
            } else {
              this.addSelected(moment(days).hours(12));
            }
          }
          days.add(7, 'd');
        }
      },

      makeSelectedDateVisible: function (date) {
        outOfViewMonth = moment(date).date('1').diff(this.viewStartDate, 'months');

        if (outOfViewMonth < 0) {
          this.viewStartDate.subtract(1, 'months');
        }
        else if (outOfViewMonth > 0 && outOfViewMonth >= this.settings.months) {
          this.viewStartDate.add(1, 'months');
        }
      },

      removeSelected: function (date, draw) {
        date = moment(date, this.settings.format).hours(12);
        var i = this._sel.length;
        while (i--) {
          if (this._sel[i].startOf('day').yearDay() === date.startOf('day').yearDay()) {
            this._sel.splice(i, 1);
            this.publish('change', this, [date]);
            if (draw !== false) this.draw();
            return true;
          }
        }
        return false;
      },

      removeAllSelected: function (draw) {
        var i = this._sel.length;
        while (i--) {
          this.removeSelected(this._sel[i], false);
          if (i === 0) {
            if (draw !== false) this.draw();
            return true;
          }
        }
        return false;
      },

      draw: function draw () {
        // return;
        var month = moment(this.viewStartDate).startOf('month').add(12, 'hours'), //force middle of the day to avoid any weird date shifts
          day,
          classes = this.classes,
          cal,
          $span,
          klass,
          i = 0, c,
          j = 0, k,
          t = 0, z,
          w,
          s,
          headers,
          dateString,
          opts = this.settings,
          diff;

        c = this.calendars.length;

        do {
          day = moment(month).date(1);
          day.day(day.day() < this.settings.weekStart ? this.settings.weekStart - 7 : this.settings.weekStart);
          //if the first day of the month is less than our week start, back up a week

          cal = this.calendars[i];
          cal.header.parentNode.setAttribute('data-datestart', month.format(this.settings.dayAttributeFormat));

          cal.caption.querySelector('.k-caption-month').innerHTML = month.format(this.settings.titleMonthFormat);
          cal.caption.querySelector('.k-caption-year').innerHTML = month.format(this.settings.titleYearFormat);

          j = 0;
          w = 0;
          t = 0;
          headers = [];
          for (var z = 0; z < 7; z++) {
            util.removeClassName(cal.header.children[z], classes.daySelected);
            headers[z] = 0;
          }

          do {
            if (opts.mode == 'week') {
              if (((j % 7) === 0) && (j !== 0)) {
                w++;
              }
              $span = cal.days[w].childNodes[j % 7];
            } else {
              $span = cal.days[j];
            }

            klass = [];

            s = this.isSelected(day);

            if (s) klass.push(({ '-1': classes.dayInRange, '1': classes.daySelected, 'true': classes.daySelected })[s]);

            if (opts.mode === 'range') {
              if (this._sel[0] && this._sel[0].startOf('day').yearDay() === day.clone().startOf('day').yearDay()) {
                klass.push(classes.dayInRangeStart);
              }
              if (this._sel[1] && this._sel[1].startOf('day').yearDay() === day.clone().startOf('day').yearDay()) {
                klass.push(classes.dayInRangeEnd);
              }
            }

            if (opts.dayHeaderClickable && opts.mode === 'multiple') {
              klass.push('k-day-week-' + day.weekday());
              if ((s == true || s == 1) && !this.direction(day) && month.format('M') == day.format('M')) {
                headers[day.weekday()] = headers[day.weekday()] + 1;
              }
            }

            if (day.month() != month.month())
              klass.push(classes.dayOutOfMonth);
            else klass.push(classes.dayInMonth);

            if (!(this.blackout(day) || this.direction(day) || (!!this.endDate && day.isAfter(this.endDate, 'day')) || (day.month() != month.month() && opts.dayOutOfMonthClickable === false)) || s > 0)
              klass.push(classes.dayActive);

            if (this.blackout(day))
              klass.push(classes.dayBlackout);

            if (day.clone().startOf('day').yearDay() === getTodayYearDate())
              klass.push(classes.dayToday);

            dateString = day.format(this.settings.dayAttributeFormat);
            if (opts.dateClassMap[dateString])
              klass.push(opts.dateClassMap[dateString]);

            $span.innerHTML = day.format(opts.dayNumberFormat);
            $span.className = klass.join(' ');
            $span.setAttribute('data-date', dateString);


            day.add(1, 'days');
          } while (++j < 42);

          z = 0;
          if (headers.length > 0) {
            do {
              if (headers[z] > 0) {
                var firstDay = Kalendae.moment(month).startOf('month').weekday(z),
                  startMonth = Kalendae.moment(month).startOf('month');
                endMonth = Kalendae.moment(month).endOf('month');
                t = 0;
                do {
                  if (firstDay >= startMonth && !this.direction(firstDay)) t++;
                  firstDay.add(7, 'd');
                } while (firstDay <= endMonth);

                if (t == headers[z]) util.addClassName(cal.header.children[z], classes.daySelected);
                else util.removeClassName(cal.header.children[z], classes.daySelected);
              }
            } while (++z < headers.length);

            if (!!opts.endDate && month.isSame(this.endDate, 'month')) {
              this.disableNextMonth = true;
              this.disableNextYear = true;
              util.addClassName(this.container, classes.disableNextMonth);
              util.addClassName(this.container, classes.disableNextYear);
            } else {
              this.disableNextMonth = false;
              this.disableNextYear = false;
              util.removeClassName(this.container, classes.disableNextMonth);
              util.removeClassName(this.container, classes.disableNextYear);
            }
          }

          month.add(1, 'months');
        } while (++i < c);

        if (opts.directionScrolling) {
          var diffComparison = moment().startOf('day').hours(12);
          diff = month.diff(diffComparison, 'months', true);

          if (opts.direction === 'today-past' || opts.direction === 'past') {
            if (diff <= 0) {
              this.disableNextMonth = false;
              util.removeClassName(this.container, classes.disableNextMonth);
            } else {
              this.disableNextMonth = true;
              util.addClassName(this.container, classes.disableNextMonth);
            }
          } else if (opts.direction === 'today-future' || opts.direction === 'future') {
            if (diff > opts.months) {
              this.disablePreviousMonth = false;
              util.removeClassName(this.container, classes.disablePreviousMonth);
            } else {
              this.disablePreviousMonth = true;
              util.addClassName(this.container, classes.disablePreviousMonth);
            }
          }

          if (opts.direction === 'today-past' || opts.direction === 'past') {
            if (diff <= -11) {
              this.disableNextYear = false;
              util.removeClassName(this.container, classes.disableNextYear);
            } else {
              this.disableNextYear = true;
              util.addClassName(this.container, classes.disableNextYear);
            }
          } else if (opts.direction === 'today-future' || opts.direction === 'future') {
            if (diff > (11 + opts.months)) {
              this.disablePreviousYear = false;
              util.removeClassName(this.container, classes.disablePreviousYear);
            } else {
              this.disablePreviousYear = true;
              util.addClassName(this.container, classes.disablePreviousYear);
            }
          }
        }
        this.publish('draw-end', this);
      }
    };

    var parseDates = function (input, delimiter, format) {
      var output = [];

      if (typeof input === 'string') {
        input = input.split(delimiter);
      } else if (!util.isArray(input)) {
        input = [input];
      }

      var c = input.length,
        i = 0,
        m;

      do {
        if (input[i]) {
          m = moment(input[i], format).hours(12);
          if (m.isValid()) output.push(m);
        }
      } while (++i < c);

      return output;
    };



    window.Kalendae = Kalendae;

    var util = Kalendae.util = {

      isIE8: function () {
        return !!((/msie 8./i).test(navigator.appVersion) && !(/opera/i).test(navigator.userAgent) && window.ActiveXObject && XDomainRequest && !window.msPerformance);
      },

      isTouchDevice: function () {
        return (('ontouchstart' in window) || (navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0));
        //navigator.maxTouchPoints for microsoft IE11
        //navigator.msMaxTouchPoints for microsoft IE backwards compatibility
      },

      // ELEMENT FUNCTIONS

      $: function (elem) {
        return (typeof elem == 'string') ? document.getElementById(elem) : elem;
      },

      $$: function (selector) {
        return document.querySelectorAll(selector);
      },

      make: function (tagName, attributes, attach) {
        var k, e = document.createElement(tagName);
        if (!!attributes) for (k in attributes) if (attributes.hasOwnProperty(k)) e.setAttribute(k, attributes[k]);
        if (!!attach) attach.appendChild(e);
        return e;
      },

      // Returns true if the DOM element is visible, false if it's hidden.
      // Checks if display is anything other than none.
      isVisible: function (elem) {
        // shamelessly copied from jQuery
        return elem.offsetWidth > 0 || elem.offsetHeight > 0;
      },

      getStyle: function (elem, styleProp) {
        var y, s;
        if (elem.currentStyle) {
          y = elem.currentStyle[styleProp];
        } else if (window.getComputedStyle) {
          s = window.getComputedStyle(elem, null);
          y = s ? s[styleProp] : '';
        }
        return y;
      },

      domReady: function (f) {
        var state = document.readyState;
        if (state === 'complete' || state === 'interactive') {
          f();
        } else {
          setTimeout(function () { util.domReady(f); }, 9);
        }
      },

      // Adds a listener callback to a DOM element which is fired on a specified
      // event.  Callback is sent the event object and the element that triggered the event
      addEvent: function (elem, eventName, callback) {
        var listener = function (event) {
          event = event || window.event;
          var target = event.target || event.srcElement;
          var block = callback.apply(elem, [event, target]);
          if (block === false) {
            if (!!event.preventDefault) event.preventDefault();
            else {
              event.returnValue = false;
              event.cancelBubble = true;
            }
          }
          return block;
        };
        if (elem.attachEvent) { // IE only.  The "on" is mandatory.
          elem.attachEvent("on" + eventName, listener);
        } else { // Other browsers.
          // if (eventName === 'mousedown' && util.isTouchDevice()) {
          //   //works on touch devices
          //   elem.addEventListener('touchstart', listener, false);
          // } else {
          //   elem.addEventListener(eventName, listener, false);
          // }
          elem.addEventListener(eventName, listener, false);
        }
        return listener;
      },

      // Removes a listener callback from a DOM element which is fired on a specified
      // event.
      removeEvent: function (elem, event, listener) {
        if (elem.detachEvent) {	// IE only.  The "on" is mandatory.
          elem.detachEvent("on" + event, listener);
        } else { // Other browsers.
          elem.removeEventListener(event, listener, false);
        }
      },

      fireEvent: function (elem, event) {
        if (document.createEvent) {
          var e = document.createEvent('HTMLEvents');
          e.initEvent(event, true, true);
          elem.dispatchEvent(e);
        } else if (document.createEventObject) {
          elem.fireEvent('on' + event);
        } else if (typeof elem['on' + event] == 'function') {
          elem['on' + event]();
        }
      },

      hasClassName: function (elem, className) { //copied and modified from Prototype.js
        if (!(elem = util.$(elem))) return false;
        var eClassName = elem.className;
        return (eClassName.length > 0 && (eClassName == className || new RegExp("(^|\\s)" + className + "(\\s|$)").test(eClassName)));
      },

      addClassName: function (elem, className) { //copied and modified from Prototype.js
        if (!(elem = util.$(elem))) return;
        if (!util.hasClassName(elem, className)) elem.className += (elem.className ? ' ' : '') + className;
      },

      removeClassName: function (elem, className) { //copied and modified from Prototype.js
        if (!(elem = util.$(elem))) return;
        elem.className = util.trimString(elem.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' '));
      },

      isFixed: function (elem) {
        do {
          if (util.getStyle(elem, 'position') === 'fixed') return true;
        } while ((elem = elem.offsetParent));
        return false;
      },

      scrollContainer: function (elem) {
        do {
          var overflow = util.getStyle(elem, 'overflow');
          if (overflow === 'auto' || overflow === 'scroll') return elem;
        } while ((elem = elem.parentNode) && elem != window.document.body);
        return null;
      },

      getPosition: function (elem, isInner) {
        var x = elem.offsetLeft,
          y = elem.offsetTop,
          r = {};

        if (!isInner) {
          while ((elem = elem.offsetParent)) {
            x += elem.offsetLeft;
            y += elem.offsetTop;
          }
        }

        r[0] = r.left = x;
        r[1] = r.top = y;
        return r;
      },

      getHeight: function (elem) {
        return elem.offsetHeight || elem.scrollHeight;
      },

      getWidth: function (elem) {
        return elem.offsetWidth || elem.scrollWidth;
      },


      // TEXT FUNCTIONS

      trimString: function (input) {
        return input.replace(/^\s+/, '').replace(/\s+$/, '');
      },


      // OBJECT FUNCTIONS

      merge: function () {
        /* Combines multiple objects into one.
         * Syntax: util.extend([true], object1, object2, ... objectN)
         * If first argument is true, function will merge recursively.
         */

        var deep = (arguments[0] === true),
          d = {},
          i = deep ? 1 : 0;

        var _c = function (a, b) {
          if (typeof b !== 'object') return;
          for (var k in b) if (b.hasOwnProperty(k)) {
            //if property is an object or array, merge the contents instead of overwriting, if extend() was called as such
            if (deep && typeof a[k] === 'object' && typeof b[k] === 'object') _update(a[k], b[k]);
            else a[k] = b[k];
          }
          return a;
        };

        for (; i < arguments.length; i++) {
          _c(d, arguments[i]);
        }
        return d;
      },

      isArray: function (array) {
        return Object.prototype.toString.call(array) == "[object Array]";
      }
    };


    //auto-initializaiton code
    if (typeof document.addEventListener === 'function') Kalendae.util.domReady(function () {
      var els = util.$$('.auto-kal'),
        i = els.length,
        e,
        options,
        optionsRaw;

      while (i--) {
        e = els[i];
        optionsRaw = e.getAttribute('data-kal');
        options = (optionsRaw == null || optionsRaw == "") ? {} : (new Function('return {' + optionsRaw + '};'))();

        if (e.tagName === 'INPUT') {
          //if element is an input, bind a popup calendar to the input.
          new Kalendae.Input(e, options);
        } else {
          //otherwise, insert a flat calendar into the element.
          new Kalendae(util.merge(options, { attachTo: e }));
        }

      }
    });
    Kalendae.Input = function (targetElement, options) {
      if (typeof document.addEventListener !== 'function' && !util.isIE8()) return;

      var $input = this.input = util.$(targetElement),
        overwriteInput,
        $closeButton,
        changing = false;

      if (!$input || $input.tagName !== 'INPUT') throw "First argument for Kalendae.Input must be an <input> element or a valid element id.";

      var self = this,
        classes = self.classes,
        opts = self.settings = util.merge(self.defaults, options);

      this._events = {};

      //force attachment to the body
      opts.attachTo = window.document.body;

      //if no override provided, use the input's contents
      if (!opts.selected) opts.selected = $input.value;
      else overwriteInput = true;

      //call our parent constructor
      Kalendae.call(self, opts);

      //create the close button
      if (opts.closeButton) {
        $closeButton = util.make('a', { 'class': classes.closeButton }, self.container);
        util.addEvent($closeButton, 'click', function () {
          $input.blur();
        });
      }

      if (overwriteInput) $input.value = self.getSelected();

      var $container = self.container,
        noclose = false;

      $container.style.display = 'none';
      util.addClassName($container, classes.positioned);

      this._events.containerMouseDown = util.addEvent($container, 'mousedown', function (event, target) {
        noclose = true; //IE8 doesn't obey event blocking when it comes to focusing, so we have to do this shit.
      });

      this._events.documentMousedown = util.addEvent(window.document, 'mousedown', function (event, target) {
        noclose = false;
      });

      this._events.inputFocus = util.addEvent($input, 'focus', function () {
        changing = true; // prevent setSelected from altering the input contents.
        self.setSelected(this.value);
        changing = false;
        self.show();
      });

      this._events.inputBlur = util.addEvent($input, 'blur', function () {
        if (noclose && util.isIE8()) {
          noclose = false;
          $input.focus();
        }
        else self.hide();
      });

      this._events.inputKeyup = util.addEvent($input, 'keyup', function (event) {
        changing = true; // prevent setSelected from altering the input contents.
        var dateValue = parseDates(this.value, self.settings.parseSplitDelimiter, self.settings.format);

        // If the date in the field is parsable as a valid date, update.  Otherwise deselect and show default view.
        if (dateValue && dateValue.length && dateValue[0] && dateValue[0].year() > 1000) {
          self.setSelected(this.value);
        } else {
          self.setSelected('', null);
          self.viewStartDate = moment(self.defaultView);
          self.draw();
        }
        changing = false;
      });

      var $scrollContainer = util.scrollContainer($input);

      if ($scrollContainer) {

        // Hide calendar when $scrollContainer is scrolled
        util.addEvent($scrollContainer, 'scroll', function (event) {
          $input.blur();
        });
      }

      self.subscribe('change', function () {
        if (changing) {
          // the change event came from an internal modification, don't update the field contents
          return;
        }
        $input.value = self.getSelected();
        util.fireEvent($input, 'change');
        if (opts.closeOnSelection && opts.mode === 'single') {
          $input.blur();
          self.hide();
        }
      });

    };

    Kalendae.Input.prototype = util.merge(Kalendae.prototype, {
      defaults: util.merge(Kalendae.prototype.defaults, {
        format: 'YYYY/MM/DD',
        side: 'bottom',
        closeButton: true,
        offsetLeft: 0,
        offsetTop: 0,
        direction: 'today-past',
        months: 3
      }),
      classes: util.merge(Kalendae.prototype.classes, {
        positioned: 'k-floating',
        closeButton: 'k-btn-close'
      }),

      show: function () {
        var $container = this.container,
          style = $container.style,
          $input = this.input,
          pos = util.getPosition($input),
          $scrollContainer = util.scrollContainer($input),
          scrollTop = $scrollContainer ? $scrollContainer.scrollTop : 0,
          scrollLeft = $scrollContainer ? $scrollContainer.scrollLeft : 0,
          opts = this.settings;

        style.display = '';
        switch (opts.side) {
          case 'left':
            style.left = (pos.left - util.getWidth($container) + opts.offsetLeft - scrollLeft) + 'px';
            style.top = (pos.top + opts.offsetTop - scrollTop) + 'px';
            break;
          case 'right':
            style.left = (pos.left + util.getWidth($input) - scrollLeft) + 'px';
            style.top = (pos.top + opts.offsetTop - scrollTop) + 'px';
            break;
          case 'top':
            style.left = (pos.left + opts.offsetLeft - scrollLeft) + 'px';
            style.top = (pos.top - util.getHeight($container) + opts.offsetTop - scrollTop) + 'px';
            break;
          case 'bottom right':
            style.left = (pos.left - util.getWidth($container) + util.getWidth($input) + opts.offsetLeft) + 'px';
            style.top = (pos.top + util.getHeight($input) + opts.offsetTop - scrollTop) + 'px';
            break;
          case 'bottom':
          /* falls through */
          default:
            style.left = (pos.left + opts.offsetLeft - scrollLeft) + 'px';
            style.top = (pos.top + util.getHeight($input) + opts.offsetTop - scrollTop) + 'px';
            break;
        }

        style.position = util.isFixed($input) ? 'fixed' : 'absolute';

        this.publish('show', this);
      },

      hide: function () {
        this.container.style.display = 'none';
        this.publish('hide', this);
      },

      destroy: function () {
        var $container = this.container;
        var $input = this.input;

        util.removeEvent($container, 'mousedown', this._events.containerMousedown);

        util.removeEvent(window.document, 'mousedown', this._events.documentMousedown);

        util.removeEvent($input, 'focus', this._events.inputFocus);

        util.removeEvent($input, 'blur', this._events.inputBlur);

        util.removeEvent($input, 'keyup', this._events.inputKeyup);

        if ($container.parentNode) {
          $container.parentNode.removeChild($container);
        }
      }
    });


    /*!
    * MinPubSub, modified for use on Kalendae
    * Copyright(c) 2011 Daniel Lamb <daniellmb.com>
    * https://github.com/daniellmb/MinPubSub
    * MIT Licensed
    */

    var MinPubSub = function (d) {

      if (!d) d = this;

      // the topic/subscription hash
      var cache = d.c_ || {}; //check for "c_" cache for unit testing

      d.publish = function (/* String */ topic, /* Object */ target, /* Array? */ args) {
        // summary:
        //		Publish some data on a named topic.
        // topic: String
        //		The channel to publish on
        // args: Array?
        //		The data to publish. Each array item is converted into an ordered
        //		arguments on the subscribed functions.
        //
        // example:
        //		Publish stuff on '/some/topic'. Anything subscribed will be called
        //		with a function signature like: function(a,b,c){ ... }
        //
        //		publish("/some/topic", ["a","b","c"]);

        var subs = cache[topic],
          len = subs ? subs.length : 0,
          r;

        //can change loop or reverse array if the order matters
        while (len--) {
          r = subs[len].apply(target, args || []);
          if (typeof r === 'boolean') return r;
        }
      };

      d.subscribe = function (/* String */ topic, /* Function */ callback, /* Boolean */ topPriority) {
        // summary:
        //		Register a callback on a named topic.
        // topic: String
        //		The channel to subscribe to
        // callback: Function
        //		The handler event. Anytime something is publish'ed on a
        //		subscribed channel, the callback will be called with the
        //		published array as ordered arguments.
        //
        // returns: Array
        //		A handle which can be used to unsubscribe this particular subscription.
        //
        // example:
        //		subscribe("/some/topic", function(a, b, c){ /* handle data */ });

        if (!cache[topic]) {
          cache[topic] = [];
        }
        if (topPriority)
          cache[topic].push(callback);
        else
          cache[topic].unshift(callback);
        return [topic, callback]; // Array
      };

      d.unsubscribe = function (/* Array */ handle) {
        // summary:
        //		Disconnect a subscribed function for a topic.
        // handle: Array
        //		The return value from a subscribe call.
        // example:
        //		var handle = subscribe("/some/topic", function(){});
        //		unsubscribe(handle);

        var subs = cache[handle[0]],
          callback = handle[1],
          len = subs ? subs.length : 0;

        while (len--) {
          if (subs[len] === callback) {
            subs.splice(len, 1);
          }
        }
      };

    };//! moment.js
    //! version : 2.9.0
    //! authors : Tim Wood, Iskren Chernev, Moment.js contributors
    //! license : MIT
    //! momentjs.com

    (function (undefined) {
      /************************************
          Constants
      ************************************/

      var moment,
        VERSION = '2.9.0',
        // the global-scope this is NOT the global object in Node.js
        globalScope = (typeof global !== 'undefined' && (typeof window === 'undefined' || window === global.window)) ? global : this,
        oldGlobalMoment,
        round = Math.round,
        hasOwnProperty = Object.prototype.hasOwnProperty,
        i,

        YEAR = 0,
        MONTH = 1,
        DATE = 2,
        HOUR = 3,
        MINUTE = 4,
        SECOND = 5,
        MILLISECOND = 6,

        // internal storage for locale config files
        locales = {},

        // extra moment internal properties (plugins register props here)
        momentProperties = [],

        // check for nodeJS
        hasModule = (typeof module !== 'undefined' && module && module.exports),

        // ASP.NET json date format regex
        aspNetJsonRegex = /^\/?Date\((\-?\d+)/i,
        aspNetTimeSpanJsonRegex = /(\-)?(?:(\d*)\.)?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/,

        // from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
        // somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
        isoDurationRegex = /^(-)?P(?:(?:([0-9,.]*)Y)?(?:([0-9,.]*)M)?(?:([0-9,.]*)D)?(?:T(?:([0-9,.]*)H)?(?:([0-9,.]*)M)?(?:([0-9,.]*)S)?)?|([0-9,.]*)W)$/,

        // format tokens
        formattingTokens = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|Q|YYYYYY|YYYYY|YYYY|YY|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|mm?|ss?|S{1,4}|x|X|zz?|ZZ?|.)/g,
        localFormattingTokens = /(\[[^\[]*\])|(\\)?(LTS|LT|LL?L?L?|l{1,4})/g,

        // parsing token regexes
        parseTokenOneOrTwoDigits = /\d\d?/, // 0 - 99
        parseTokenOneToThreeDigits = /\d{1,3}/, // 0 - 999
        parseTokenOneToFourDigits = /\d{1,4}/, // 0 - 9999
        parseTokenOneToSixDigits = /[+\-]?\d{1,6}/, // -999,999 - 999,999
        parseTokenDigits = /\d+/, // nonzero number of digits
        parseTokenWord = /[0-9]*['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+|[\u0600-\u06FF\/]+(\s*?[\u0600-\u06FF]+){1,2}/i, // any word (or two) characters or numbers including two/three word month in arabic.
        parseTokenTimezone = /Z|[\+\-]\d\d:?\d\d/gi, // +00:00 -00:00 +0000 -0000 or Z
        parseTokenT = /T/i, // T (ISO separator)
        parseTokenOffsetMs = /[\+\-]?\d+/, // 1234567890123
        parseTokenTimestampMs = /[\+\-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123

        //strict parsing regexes
        parseTokenOneDigit = /\d/, // 0 - 9
        parseTokenTwoDigits = /\d\d/, // 00 - 99
        parseTokenThreeDigits = /\d{3}/, // 000 - 999
        parseTokenFourDigits = /\d{4}/, // 0000 - 9999
        parseTokenSixDigits = /[+-]?\d{6}/, // -999,999 - 999,999
        parseTokenSignedNumber = /[+-]?\d+/, // -inf - inf

        // iso 8601 regex
        // 0000-00-00 0000-W00 or 0000-W00-0 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000 or +00)
        isoRegex = /^\s*(?:[+-]\d{6}|\d{4})-(?:(\d\d-\d\d)|(W\d\d$)|(W\d\d-\d)|(\d\d\d))((T| )(\d\d(:\d\d(:\d\d(\.\d+)?)?)?)?([\+\-]\d\d(?::?\d\d)?|\s*Z)?)?$/,

        isoFormat = 'YYYY-MM-DDTHH:mm:ssZ',

        isoDates = [
          ['YYYYYY-MM-DD', /[+-]\d{6}-\d{2}-\d{2}/],
          ['YYYY-MM-DD', /\d{4}-\d{2}-\d{2}/],
          ['GGGG-[W]WW-E', /\d{4}-W\d{2}-\d/],
          ['GGGG-[W]WW', /\d{4}-W\d{2}/],
          ['YYYY-DDD', /\d{4}-\d{3}/]
        ],

        // iso time formats and regexes
        isoTimes = [
          ['HH:mm:ss.SSSS', /(T| )\d\d:\d\d:\d\d\.\d+/],
          ['HH:mm:ss', /(T| )\d\d:\d\d:\d\d/],
          ['HH:mm', /(T| )\d\d:\d\d/],
          ['HH', /(T| )\d\d/]
        ],

        // timezone chunker '+10:00' > ['10', '00'] or '-1530' > ['-', '15', '30']
        parseTimezoneChunker = /([\+\-]|\d\d)/gi,

        // getter and setter names
        proxyGettersAndSetters = 'Date|Hours|Minutes|Seconds|Milliseconds'.split('|'),
        unitMillisecondFactors = {
          'Milliseconds': 1,
          'Seconds': 1e3,
          'Minutes': 6e4,
          'Hours': 36e5,
          'Days': 864e5,
          'Months': 2592e6,
          'Years': 31536e6
        },

        unitAliases = {
          ms: 'millisecond',
          s: 'second',
          m: 'minute',
          h: 'hour',
          d: 'day',
          D: 'date',
          w: 'week',
          W: 'isoWeek',
          M: 'month',
          Q: 'quarter',
          y: 'year',
          DDD: 'dayOfYear',
          e: 'weekday',
          E: 'isoWeekday',
          gg: 'weekYear',
          GG: 'isoWeekYear'
        },

        camelFunctions = {
          dayofyear: 'dayOfYear',
          isoweekday: 'isoWeekday',
          isoweek: 'isoWeek',
          weekyear: 'weekYear',
          isoweekyear: 'isoWeekYear'
        },

        // format function strings
        formatFunctions = {},

        // default relative time thresholds
        relativeTimeThresholds = {
          s: 45,  // seconds to minute
          m: 45,  // minutes to hour
          h: 22,  // hours to day
          d: 26,  // days to month
          M: 11   // months to year
        },

        // tokens to ordinalize and pad
        ordinalizeTokens = 'DDD w W M D d'.split(' '),
        paddedTokens = 'M D H h m s w W'.split(' '),

        formatTokenFunctions = {
          M: function () {
            return this.month() + 1;
          },
          MMM: function (format) {
            return this.localeData().monthsShort(this, format);
          },
          MMMM: function (format) {
            return this.localeData().months(this, format);
          },
          D: function () {
            return this.date();
          },
          DDD: function () {
            return this.dayOfYear();
          },
          d: function () {
            return this.day();
          },
          dd: function (format) {
            return this.localeData().weekdaysMin(this, format);
          },
          ddd: function (format) {
            return this.localeData().weekdaysShort(this, format);
          },
          dddd: function (format) {
            return this.localeData().weekdays(this, format);
          },
          w: function () {
            return this.week();
          },
          W: function () {
            return this.isoWeek();
          },
          YY: function () {
            return leftZeroFill(this.year() % 100, 2);
          },
          YYYY: function () {
            return leftZeroFill(this.year(), 4);
          },
          YYYYY: function () {
            return leftZeroFill(this.year(), 5);
          },
          YYYYYY: function () {
            var y = this.year(), sign = y >= 0 ? '+' : '-';
            return sign + leftZeroFill(Math.abs(y), 6);
          },
          gg: function () {
            return leftZeroFill(this.weekYear() % 100, 2);
          },
          gggg: function () {
            return leftZeroFill(this.weekYear(), 4);
          },
          ggggg: function () {
            return leftZeroFill(this.weekYear(), 5);
          },
          GG: function () {
            return leftZeroFill(this.isoWeekYear() % 100, 2);
          },
          GGGG: function () {
            return leftZeroFill(this.isoWeekYear(), 4);
          },
          GGGGG: function () {
            return leftZeroFill(this.isoWeekYear(), 5);
          },
          e: function () {
            return this.weekday();
          },
          E: function () {
            return this.isoWeekday();
          },
          a: function () {
            return this.localeData().meridiem(this.hours(), this.minutes(), true);
          },
          A: function () {
            return this.localeData().meridiem(this.hours(), this.minutes(), false);
          },
          H: function () {
            return this.hours();
          },
          h: function () {
            return this.hours() % 12 || 12;
          },
          m: function () {
            return this.minutes();
          },
          s: function () {
            return this.seconds();
          },
          S: function () {
            return toInt(this.milliseconds() / 100);
          },
          SS: function () {
            return leftZeroFill(toInt(this.milliseconds() / 10), 2);
          },
          SSS: function () {
            return leftZeroFill(this.milliseconds(), 3);
          },
          SSSS: function () {
            return leftZeroFill(this.milliseconds(), 3);
          },
          Z: function () {
            var a = this.utcOffset(),
              b = '+';
            if (a < 0) {
              a = -a;
              b = '-';
            }
            return b + leftZeroFill(toInt(a / 60), 2) + ':' + leftZeroFill(toInt(a) % 60, 2);
          },
          ZZ: function () {
            var a = this.utcOffset(),
              b = '+';
            if (a < 0) {
              a = -a;
              b = '-';
            }
            return b + leftZeroFill(toInt(a / 60), 2) + leftZeroFill(toInt(a) % 60, 2);
          },
          z: function () {
            return this.zoneAbbr();
          },
          zz: function () {
            return this.zoneName();
          },
          x: function () {
            return this.valueOf();
          },
          X: function () {
            return this.unix();
          },
          Q: function () {
            return this.quarter();
          }
        },

        deprecations = {},

        lists = ['months', 'monthsShort', 'weekdays', 'weekdaysShort', 'weekdaysMin'],

        updateInProgress = false;

      // Pick the first defined of two or three arguments. dfl comes from
      // default.
      function dfl (a, b, c) {
        switch (arguments.length) {
          case 2: return a != null ? a : b;
          case 3: return a != null ? a : b != null ? b : c;
          default: throw new Error('Implement me');
        }
      }

      function hasOwnProp (a, b) {
        return hasOwnProperty.call(a, b);
      }

      function defaultParsingFlags () {
        // We need to deep clone this object, and es5 standard is not very
        // helpful.
        return {
          empty: false,
          unusedTokens: [],
          unusedInput: [],
          overflow: -2,
          charsLeftOver: 0,
          nullInput: false,
          invalidMonth: null,
          invalidFormat: false,
          userInvalidated: false,
          iso: false
        };
      }

      function printMsg (msg) {
        if (moment.suppressDeprecationWarnings === false &&
          typeof console !== 'undefined' && console.warn) {
          console.warn('Deprecation warning: ' + msg);
        }
      }

      function deprecate (msg, fn) {
        var firstTime = true;
        return extend(function () {
          if (firstTime) {
            printMsg(msg);
            firstTime = false;
          }
          return fn.apply(this, arguments);
        }, fn);
      }

      function deprecateSimple (name, msg) {
        if (!deprecations[name]) {
          printMsg(msg);
          deprecations[name] = true;
        }
      }

      function padToken (func, count) {
        return function (a) {
          return leftZeroFill(func.call(this, a), count);
        };
      }
      function ordinalizeToken (func, period) {
        return function (a) {
          return this.localeData().ordinal(func.call(this, a), period);
        };
      }

      function monthDiff (a, b) {
        // difference in months
        var wholeMonthDiff = ((b.year() - a.year()) * 12) + (b.month() - a.month()),
          // b is in (anchor - 1 month, anchor + 1 month)
          anchor = a.clone().add(wholeMonthDiff, 'months'),
          anchor2, adjust;

        if (b - anchor < 0) {
          anchor2 = a.clone().add(wholeMonthDiff - 1, 'months');
          // linear across the month
          adjust = (b - anchor) / (anchor - anchor2);
        } else {
          anchor2 = a.clone().add(wholeMonthDiff + 1, 'months');
          // linear across the month
          adjust = (b - anchor) / (anchor2 - anchor);
        }

        return -(wholeMonthDiff + adjust);
      }

      while (ordinalizeTokens.length) {
        i = ordinalizeTokens.pop();
        formatTokenFunctions[i + 'o'] = ordinalizeToken(formatTokenFunctions[i], i);
      }
      while (paddedTokens.length) {
        i = paddedTokens.pop();
        formatTokenFunctions[i + i] = padToken(formatTokenFunctions[i], 2);
      }
      formatTokenFunctions.DDDD = padToken(formatTokenFunctions.DDD, 3);


      function meridiemFixWrap (locale, hour, meridiem) {
        var isPm;

        if (meridiem == null) {
          // nothing to do
          return hour;
        }
        if (locale.meridiemHour != null) {
          return locale.meridiemHour(hour, meridiem);
        } else if (locale.isPM != null) {
          // Fallback
          isPm = locale.isPM(meridiem);
          if (isPm && hour < 12) {
            hour += 12;
          }
          if (!isPm && hour === 12) {
            hour = 0;
          }
          return hour;
        } else {
          // thie is not supposed to happen
          return hour;
        }
      }

      /************************************
          Constructors
      ************************************/

      function Locale () {
      }

      // Moment prototype object
      function Moment (config, skipOverflow) {
        if (skipOverflow !== false) {
          checkOverflow(config);
        }
        copyConfig(this, config);
        this._d = new Date(+config._d);
        // Prevent infinite loop in case updateOffset creates new moment
        // objects.
        if (updateInProgress === false) {
          updateInProgress = true;
          moment.updateOffset(this);
          updateInProgress = false;
        }
      }

      // Duration Constructor
      function Duration (duration) {
        var normalizedInput = normalizeObjectUnits(duration),
          years = normalizedInput.year || 0,
          quarters = normalizedInput.quarter || 0,
          months = normalizedInput.month || 0,
          weeks = normalizedInput.week || 0,
          days = normalizedInput.day || 0,
          hours = normalizedInput.hour || 0,
          minutes = normalizedInput.minute || 0,
          seconds = normalizedInput.second || 0,
          milliseconds = normalizedInput.millisecond || 0;

        // representation for dateAddRemove
        this._milliseconds = +milliseconds +
          seconds * 1e3 + // 1000
          minutes * 6e4 + // 1000 * 60
          hours * 36e5; // 1000 * 60 * 60
        // Because of dateAddRemove treats 24 hours as different from a
        // day when working around DST, we need to store them separately
        this._days = +days +
          weeks * 7;
        // It is impossible translate months into days without knowing
        // which months you are are talking about, so we have to store
        // it separately.
        this._months = +months +
          quarters * 3 +
          years * 12;

        this._data = {};

        this._locale = moment.localeData();

        this._bubble();
      }

      /************************************
          Helpers
      ************************************/


      function extend (a, b) {
        for (var i in b) {
          if (hasOwnProp(b, i)) {
            a[i] = b[i];
          }
        }

        if (hasOwnProp(b, 'toString')) {
          a.toString = b.toString;
        }

        if (hasOwnProp(b, 'valueOf')) {
          a.valueOf = b.valueOf;
        }

        return a;
      }

      function copyConfig (to, from) {
        var i, prop, val;

        if (typeof from._isAMomentObject !== 'undefined') {
          to._isAMomentObject = from._isAMomentObject;
        }
        if (typeof from._i !== 'undefined') {
          to._i = from._i;
        }
        if (typeof from._f !== 'undefined') {
          to._f = from._f;
        }
        if (typeof from._l !== 'undefined') {
          to._l = from._l;
        }
        if (typeof from._strict !== 'undefined') {
          to._strict = from._strict;
        }
        if (typeof from._tzm !== 'undefined') {
          to._tzm = from._tzm;
        }
        if (typeof from._isUTC !== 'undefined') {
          to._isUTC = from._isUTC;
        }
        if (typeof from._offset !== 'undefined') {
          to._offset = from._offset;
        }
        if (typeof from._pf !== 'undefined') {
          to._pf = from._pf;
        }
        if (typeof from._locale !== 'undefined') {
          to._locale = from._locale;
        }

        if (momentProperties.length > 0) {
          for (i in momentProperties) {
            prop = momentProperties[i];
            val = from[prop];
            if (typeof val !== 'undefined') {
              to[prop] = val;
            }
          }
        }

        return to;
      }

      function absRound (number) {
        if (number < 0) {
          return Math.ceil(number);
        } else {
          return Math.floor(number);
        }
      }

      // left zero fill a number
      // see http://jsperf.com/left-zero-filling for performance comparison
      function leftZeroFill (number, targetLength, forceSign) {
        var output = '' + Math.abs(number),
          sign = number >= 0;

        while (output.length < targetLength) {
          output = '0' + output;
        }
        return (sign ? (forceSign ? '+' : '') : '-') + output;
      }

      function positiveMomentsDifference (base, other) {
        var res = { milliseconds: 0, months: 0 };

        res.months = other.month() - base.month() +
          (other.year() - base.year()) * 12;
        if (base.clone().add(res.months, 'M').isAfter(other)) {
          --res.months;
        }

        res.milliseconds = +other - +(base.clone().add(res.months, 'M'));

        return res;
      }

      function momentsDifference (base, other) {
        var res;
        other = makeAs(other, base);
        if (base.isBefore(other)) {
          res = positiveMomentsDifference(base, other);
        } else {
          res = positiveMomentsDifference(other, base);
          res.milliseconds = -res.milliseconds;
          res.months = -res.months;
        }

        return res;
      }

      // TODO: remove 'name' arg after deprecation is removed
      function createAdder (direction, name) {
        return function (val, period) {
          var dur, tmp;
          //invert the arguments, but complain about it
          if (period !== null && !isNaN(+period)) {
            deprecateSimple(name, 'moment().' + name + '(period, number) is deprecated. Please use moment().' + name + '(number, period).');
            tmp = val; val = period; period = tmp;
          }

          val = typeof val === 'string' ? +val : val;
          dur = moment.duration(val, period);
          addOrSubtractDurationFromMoment(this, dur, direction);
          return this;
        };
      }

      function addOrSubtractDurationFromMoment (mom, duration, isAdding, updateOffset) {
        var milliseconds = duration._milliseconds,
          days = duration._days,
          months = duration._months;
        updateOffset = updateOffset == null ? true : updateOffset;

        if (milliseconds) {
          mom._d.setTime(+mom._d + milliseconds * isAdding);
        }
        if (days) {
          rawSetter(mom, 'Date', rawGetter(mom, 'Date') + days * isAdding);
        }
        if (months) {
          rawMonthSetter(mom, rawGetter(mom, 'Month') + months * isAdding);
        }
        if (updateOffset) {
          moment.updateOffset(mom, days || months);
        }
      }

      // check if is an array
      function isArray (input) {
        return Object.prototype.toString.call(input) === '[object Array]';
      }

      function isDate (input) {
        return Object.prototype.toString.call(input) === '[object Date]' ||
          input instanceof Date;
      }

      // compare two arrays, return the number of differences
      function compareArrays (array1, array2, dontConvert) {
        var len = Math.min(array1.length, array2.length),
          lengthDiff = Math.abs(array1.length - array2.length),
          diffs = 0,
          i;
        for (i = 0; i < len; i++) {
          if ((dontConvert && array1[i] !== array2[i]) ||
            (!dontConvert && toInt(array1[i]) !== toInt(array2[i]))) {
            diffs++;
          }
        }
        return diffs + lengthDiff;
      }

      function normalizeUnits (units) {
        if (units) {
          var lowered = units.toLowerCase().replace(/(.)s$/, '$1');
          units = unitAliases[units] || camelFunctions[lowered] || lowered;
        }
        return units;
      }

      function normalizeObjectUnits (inputObject) {
        var normalizedInput = {},
          normalizedProp,
          prop;

        for (prop in inputObject) {
          if (hasOwnProp(inputObject, prop)) {
            normalizedProp = normalizeUnits(prop);
            if (normalizedProp) {
              normalizedInput[normalizedProp] = inputObject[prop];
            }
          }
        }

        return normalizedInput;
      }

      function makeList (field) {
        var count, setter;

        if (field.indexOf('week') === 0) {
          count = 7;
          setter = 'day';
        }
        else if (field.indexOf('month') === 0) {
          count = 12;
          setter = 'month';
        }
        else {
          return;
        }

        moment[field] = function (format, index) {
          var i, getter,
            method = moment._locale[field],
            results = [];

          if (typeof format === 'number') {
            index = format;
            format = undefined;
          }

          getter = function (i) {
            var m = moment().utc().set(setter, i);
            return method.call(moment._locale, m, format || '');
          };

          if (index != null) {
            return getter(index);
          }
          else {
            for (i = 0; i < count; i++) {
              results.push(getter(i));
            }
            return results;
          }
        };
      }

      function toInt (argumentForCoercion) {
        var coercedNumber = +argumentForCoercion,
          value = 0;

        if (coercedNumber !== 0 && isFinite(coercedNumber)) {
          if (coercedNumber >= 0) {
            value = Math.floor(coercedNumber);
          } else {
            value = Math.ceil(coercedNumber);
          }
        }

        return value;
      }

      function daysInMonth (year, month) {
        return new Date(Date.UTC(year, month + 1, 0)).getUTCDate();
      }

      function weeksInYear (year, dow, doy) {
        return weekOfYear(moment([year, 11, 31 + dow - doy]), dow, doy).week;
      }

      function daysInYear (year) {
        return isLeapYear(year) ? 366 : 365;
      }

      function isLeapYear (year) {
        return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
      }

      function checkOverflow (m) {
        var overflow;
        if (m._a && m._pf.overflow === -2) {
          overflow =
            m._a[MONTH] < 0 || m._a[MONTH] > 11 ? MONTH :
              m._a[DATE] < 1 || m._a[DATE] > daysInMonth(m._a[YEAR], m._a[MONTH]) ? DATE :
                m._a[HOUR] < 0 || m._a[HOUR] > 24 ||
                  (m._a[HOUR] === 24 && (m._a[MINUTE] !== 0 ||
                    m._a[SECOND] !== 0 ||
                    m._a[MILLISECOND] !== 0)) ? HOUR :
                  m._a[MINUTE] < 0 || m._a[MINUTE] > 59 ? MINUTE :
                    m._a[SECOND] < 0 || m._a[SECOND] > 59 ? SECOND :
                      m._a[MILLISECOND] < 0 || m._a[MILLISECOND] > 999 ? MILLISECOND :
                        -1;

          if (m._pf._overflowDayOfYear && (overflow < YEAR || overflow > DATE)) {
            overflow = DATE;
          }

          m._pf.overflow = overflow;
        }
      }

      function isValid (m) {
        if (m._isValid == null) {
          m._isValid = !isNaN(m._d.getTime()) &&
            m._pf.overflow < 0 &&
            !m._pf.empty &&
            !m._pf.invalidMonth &&
            !m._pf.nullInput &&
            !m._pf.invalidFormat &&
            !m._pf.userInvalidated;

          if (m._strict) {
            m._isValid = m._isValid &&
              m._pf.charsLeftOver === 0 &&
              m._pf.unusedTokens.length === 0 &&
              m._pf.bigHour === undefined;
          }
        }
        return m._isValid;
      }

      function normalizeLocale (key) {
        return key ? key.toLowerCase().replace('_', '-') : key;
      }

      // pick the locale from the array
      // try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
      // substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
      function chooseLocale (names) {
        var i = 0, j, next, locale, split;

        while (i < names.length) {
          split = normalizeLocale(names[i]).split('-');
          j = split.length;
          next = normalizeLocale(names[i + 1]);
          next = next ? next.split('-') : null;
          while (j > 0) {
            locale = loadLocale(split.slice(0, j).join('-'));
            if (locale) {
              return locale;
            }
            if (next && next.length >= j && compareArrays(split, next, true) >= j - 1) {
              //the next array item is better than a shallower substring of this one
              break;
            }
            j--;
          }
          i++;
        }
        return null;
      }

      function loadLocale (name) {
        var oldLocale = null;
        if (!locales[name] && hasModule) {
          try {
            oldLocale = moment.locale();
            require('./locale/' + name);
            // because defineLocale currently also sets the global locale, we want to undo that for lazy loaded locales
            moment.locale(oldLocale);
          } catch (e) { }
        }
        return locales[name];
      }

      // Return a moment from input, that is local/utc/utcOffset equivalent to
      // model.
      function makeAs (input, model) {
        var res, diff;
        if (model._isUTC) {
          res = model.clone();
          diff = (moment.isMoment(input) || isDate(input) ?
            +input : +moment(input)) - (+res);
          // Use low-level api, because this fn is low-level api.
          res._d.setTime(+res._d + diff);
          moment.updateOffset(res, false);
          return res;
        } else {
          return moment(input).local();
        }
      }

      /************************************
          Locale
      ************************************/


      extend(Locale.prototype, {

        set: function (config) {
          var prop, i;
          for (i in config) {
            prop = config[i];
            if (typeof prop === 'function') {
              this[i] = prop;
            } else {
              this['_' + i] = prop;
            }
          }
          // Lenient ordinal parsing accepts just a number in addition to
          // number + (possibly) stuff coming from _ordinalParseLenient.
          this._ordinalParseLenient = new RegExp(this._ordinalParse.source + '|' + /\d{1,2}/.source);
        },

        _months: '1月_2月_3月_4月_5月_6月_7月_8月_9月_10月_11月_12月'.split('_'),
        months: function (m) {
          return this._months[m.month()];
        },

        _monthsShort: '1月_2月_3月_4月_5月_6月_7月_8月_9月_10月_11月_12月'.split('_'),
        monthsShort: function (m) {
          return this._monthsShort[m.month()];
        },

        monthsParse: function (monthName, format, strict) {
          var i, mom, regex;

          if (!this._monthsParse) {
            this._monthsParse = [];
            this._longMonthsParse = [];
            this._shortMonthsParse = [];
          }

          for (i = 0; i < 12; i++) {
            // make the regex if we don't have it already
            mom = moment.utc([2000, i]);
            if (strict && !this._longMonthsParse[i]) {
              this._longMonthsParse[i] = new RegExp('^' + this.months(mom, '').replace('.', '') + '$', 'i');
              this._shortMonthsParse[i] = new RegExp('^' + this.monthsShort(mom, '').replace('.', '') + '$', 'i');
            }
            if (!strict && !this._monthsParse[i]) {
              regex = '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
              this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
            }
            // test the regex
            if (strict && format === 'MMMM' && this._longMonthsParse[i].test(monthName)) {
              return i;
            } else if (strict && format === 'MMM' && this._shortMonthsParse[i].test(monthName)) {
              return i;
            } else if (!strict && this._monthsParse[i].test(monthName)) {
              return i;
            }
          }
        },

        _weekdays: '星期日_星期一_星期二_星期三_星期四_星期五_星期六'.split('_'),
        weekdays: function (m) {
          return this._weekdays[m.day()];
        },

        _weekdaysShort: '周日_周一_周二_周三_周四_周五_周六'.split('_'),
        weekdaysShort: function (m) {
          return this._weekdaysShort[m.day()];
        },

        _weekdaysMin: '日_一_二_三_四_五_六'.split('_'),
        weekdaysMin: function (m) {
          return this._weekdaysMin[m.day()];
        },

        weekdaysParse: function (weekdayName) {
          var i, mom, regex;

          if (!this._weekdaysParse) {
            this._weekdaysParse = [];
          }

          for (i = 0; i < 7; i++) {
            // make the regex if we don't have it already
            if (!this._weekdaysParse[i]) {
              mom = moment([2000, 1]).day(i);
              regex = '^' + this.weekdays(mom, '') + '|^' + this.weekdaysShort(mom, '') + '|^' + this.weekdaysMin(mom, '');
              this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
            }
            // test the regex
            if (this._weekdaysParse[i].test(weekdayName)) {
              return i;
            }
          }
        },

        _longDateFormat: {
          LTS: 'h:mm:ss A',
          LT: 'h:mm A',
          L: 'MM/DD/YYYY',
          LL: 'MMMM D, YYYY',
          LLL: 'MMMM D, YYYY LT',
          LLLL: 'dddd, MMMM D, YYYY LT'
        },
        longDateFormat: function (key) {
          var output = this._longDateFormat[key];
          if (!output && this._longDateFormat[key.toUpperCase()]) {
            output = this._longDateFormat[key.toUpperCase()].replace(/MMMM|MM|DD|dddd/g, function (val) {
              return val.slice(1);
            });
            this._longDateFormat[key] = output;
          }
          return output;
        },

        isPM: function (input) {
          // IE8 Quirks Mode & IE7 Standards Mode do not allow accessing strings like arrays
          // Using charAt should be more compatible.
          return ((input + '').toLowerCase().charAt(0) === 'p');
        },

        _meridiemParse: /[ap]\.?m?\.?/i,
        meridiem: function (hours, minutes, isLower) {
          if (hours > 11) {
            return isLower ? 'pm' : 'PM';
          } else {
            return isLower ? 'am' : 'AM';
          }
        },


        _calendar: {
          sameDay: '[Today at] LT',
          nextDay: '[Tomorrow at] LT',
          nextWeek: 'dddd [at] LT',
          lastDay: '[Yesterday at] LT',
          lastWeek: '[Last] dddd [at] LT',
          sameElse: 'L'
        },
        calendar: function (key, mom, now) {
          var output = this._calendar[key];
          return typeof output === 'function' ? output.apply(mom, [now]) : output;
        },

        _relativeTime: {
          future: 'in %s',
          past: '%s ago',
          s: 'a few seconds',
          m: 'a minute',
          mm: '%d minutes',
          h: 'an hour',
          hh: '%d hours',
          d: 'a day',
          dd: '%d days',
          M: 'a month',
          MM: '%d months',
          y: 'a year',
          yy: '%d years'
        },

        relativeTime: function (number, withoutSuffix, string, isFuture) {
          var output = this._relativeTime[string];
          return (typeof output === 'function') ?
            output(number, withoutSuffix, string, isFuture) :
            output.replace(/%d/i, number);
        },

        pastFuture: function (diff, output) {
          var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
          return typeof format === 'function' ? format(output) : format.replace(/%s/i, output);
        },

        ordinal: function (number) {
          return this._ordinal.replace('%d', number);
        },
        _ordinal: '%d',
        _ordinalParse: /\d{1,2}/,

        preparse: function (string) {
          return string;
        },

        postformat: function (string) {
          return string;
        },

        week: function (mom) {
          return weekOfYear(mom, this._week.dow, this._week.doy).week;
        },

        _week: {
          dow: 0, // Sunday is the first day of the week.
          doy: 6  // The week that contains Jan 1st is the first week of the year.
        },

        firstDayOfWeek: function () {
          return this._week.dow;
        },

        firstDayOfYear: function () {
          return this._week.doy;
        },

        _invalidDate: 'Invalid date',
        invalidDate: function () {
          return this._invalidDate;
        }
      });

      /************************************
          Formatting
      ************************************/


      function removeFormattingTokens (input) {
        if (input.match(/\[[\s\S]/)) {
          return input.replace(/^\[|\]$/g, '');
        }
        return input.replace(/\\/g, '');
      }

      function makeFormatFunction (format) {
        var array = format.match(formattingTokens), i, length;

        for (i = 0, length = array.length; i < length; i++) {
          if (formatTokenFunctions[array[i]]) {
            array[i] = formatTokenFunctions[array[i]];
          } else {
            array[i] = removeFormattingTokens(array[i]);
          }
        }

        return function (mom) {
          var output = '';
          for (i = 0; i < length; i++) {
            output += array[i] instanceof Function ? array[i].call(mom, format) : array[i];
          }
          return output;
        };
      }

      // format date using native date object
      function formatMoment (m, format) {
        if (!m.isValid()) {
          return m.localeData().invalidDate();
        }

        format = expandFormat(format, m.localeData());

        if (!formatFunctions[format]) {
          formatFunctions[format] = makeFormatFunction(format);
        }

        return formatFunctions[format](m);
      }

      function expandFormat (format, locale) {
        var i = 5;

        function replaceLongDateFormatTokens (input) {
          return locale.longDateFormat(input) || input;
        }

        localFormattingTokens.lastIndex = 0;
        while (i >= 0 && localFormattingTokens.test(format)) {
          format = format.replace(localFormattingTokens, replaceLongDateFormatTokens);
          localFormattingTokens.lastIndex = 0;
          i -= 1;
        }

        return format;
      }


      /************************************
          Parsing
      ************************************/


      // get the regex to find the next token
      function getParseRegexForToken (token, config) {
        var a, strict = config._strict;
        switch (token) {
          case 'Q':
            return parseTokenOneDigit;
          case 'DDDD':
            return parseTokenThreeDigits;
          case 'YYYY':
          case 'GGGG':
          case 'gggg':
            return strict ? parseTokenFourDigits : parseTokenOneToFourDigits;
          case 'Y':
          case 'G':
          case 'g':
            return parseTokenSignedNumber;
          case 'YYYYYY':
          case 'YYYYY':
          case 'GGGGG':
          case 'ggggg':
            return strict ? parseTokenSixDigits : parseTokenOneToSixDigits;
          case 'S':
            if (strict) {
              return parseTokenOneDigit;
            }
          /* falls through */
          case 'SS':
            if (strict) {
              return parseTokenTwoDigits;
            }
          /* falls through */
          case 'SSS':
            if (strict) {
              return parseTokenThreeDigits;
            }
          /* falls through */
          case 'DDD':
            return parseTokenOneToThreeDigits;
          case 'MMM':
          case 'MMMM':
          case 'dd':
          case 'ddd':
          case 'dddd':
            return parseTokenWord;
          case 'a':
          case 'A':
            return config._locale._meridiemParse;
          case 'x':
            return parseTokenOffsetMs;
          case 'X':
            return parseTokenTimestampMs;
          case 'Z':
          case 'ZZ':
            return parseTokenTimezone;
          case 'T':
            return parseTokenT;
          case 'SSSS':
            return parseTokenDigits;
          case 'MM':
          case 'DD':
          case 'YY':
          case 'GG':
          case 'gg':
          case 'HH':
          case 'hh':
          case 'mm':
          case 'ss':
          case 'ww':
          case 'WW':
            return strict ? parseTokenTwoDigits : parseTokenOneOrTwoDigits;
          case 'M':
          case 'D':
          case 'd':
          case 'H':
          case 'h':
          case 'm':
          case 's':
          case 'w':
          case 'W':
          case 'e':
          case 'E':
            return parseTokenOneOrTwoDigits;
          case 'Do':
            return strict ? config._locale._ordinalParse : config._locale._ordinalParseLenient;
          default:
            a = new RegExp(regexpEscape(unescapeFormat(token.replace('\\', '')), 'i'));
            return a;
        }
      }

      function utcOffsetFromString (string) {
        string = string || '';
        var possibleTzMatches = (string.match(parseTokenTimezone) || []),
          tzChunk = possibleTzMatches[possibleTzMatches.length - 1] || [],
          parts = (tzChunk + '').match(parseTimezoneChunker) || ['-', 0, 0],
          minutes = +(parts[1] * 60) + toInt(parts[2]);

        return parts[0] === '+' ? minutes : -minutes;
      }

      // function to convert string input to date
      function addTimeToArrayFromToken (token, input, config) {
        var a, datePartArray = config._a;

        switch (token) {
          // QUARTER
          case 'Q':
            if (input != null) {
              datePartArray[MONTH] = (toInt(input) - 1) * 3;
            }
            break;
          // MONTH
          case 'M': // fall through to MM
          case 'MM':
            if (input != null) {
              datePartArray[MONTH] = toInt(input) - 1;
            }
            break;
          case 'MMM': // fall through to MMMM
          case 'MMMM':
            a = config._locale.monthsParse(input, token, config._strict);
            // if we didn't find a month name, mark the date as invalid.
            if (a != null) {
              datePartArray[MONTH] = a;
            } else {
              config._pf.invalidMonth = input;
            }
            break;
          // DAY OF MONTH
          case 'D': // fall through to DD
          case 'DD':
            if (input != null) {
              datePartArray[DATE] = toInt(input);
            }
            break;
          case 'Do':
            if (input != null) {
              datePartArray[DATE] = toInt(parseInt(
                input.match(/\d{1,2}/)[0], 10));
            }
            break;
          // DAY OF YEAR
          case 'DDD': // fall through to DDDD
          case 'DDDD':
            if (input != null) {
              config._dayOfYear = toInt(input);
            }

            break;
          // YEAR
          case 'YY':
            datePartArray[YEAR] = moment.parseTwoDigitYear(input);
            break;
          case 'YYYY':
          case 'YYYYY':
          case 'YYYYYY':
            datePartArray[YEAR] = toInt(input);
            break;
          // AM / PM
          case 'a': // fall through to A
          case 'A':
            config._meridiem = input;
            // config._isPm = config._locale.isPM(input);
            break;
          // HOUR
          case 'h': // fall through to hh
          case 'hh':
            config._pf.bigHour = true;
          /* falls through */
          case 'H': // fall through to HH
          case 'HH':
            datePartArray[HOUR] = toInt(input);
            break;
          // MINUTE
          case 'm': // fall through to mm
          case 'mm':
            datePartArray[MINUTE] = toInt(input);
            break;
          // SECOND
          case 's': // fall through to ss
          case 'ss':
            datePartArray[SECOND] = toInt(input);
            break;
          // MILLISECOND
          case 'S':
          case 'SS':
          case 'SSS':
          case 'SSSS':
            datePartArray[MILLISECOND] = toInt(('0.' + input) * 1000);
            break;
          // UNIX OFFSET (MILLISECONDS)
          case 'x':
            config._d = new Date(toInt(input));
            break;
          // UNIX TIMESTAMP WITH MS
          case 'X':
            config._d = new Date(parseFloat(input) * 1000);
            break;
          // TIMEZONE
          case 'Z': // fall through to ZZ
          case 'ZZ':
            config._useUTC = true;
            config._tzm = utcOffsetFromString(input);
            break;
          // WEEKDAY - human
          case 'dd':
          case 'ddd':
          case 'dddd':
            a = config._locale.weekdaysParse(input);
            // if we didn't get a weekday name, mark the date as invalid
            if (a != null) {
              config._w = config._w || {};
              config._w['d'] = a;
            } else {
              config._pf.invalidWeekday = input;
            }
            break;
          // WEEK, WEEK DAY - numeric
          case 'w':
          case 'ww':
          case 'W':
          case 'WW':
          case 'd':
          case 'e':
          case 'E':
            token = token.substr(0, 1);
          /* falls through */
          case 'gggg':
          case 'GGGG':
          case 'GGGGG':
            token = token.substr(0, 2);
            if (input) {
              config._w = config._w || {};
              config._w[token] = toInt(input);
            }
            break;
          case 'gg':
          case 'GG':
            config._w = config._w || {};
            config._w[token] = moment.parseTwoDigitYear(input);
        }
      }

      function dayOfYearFromWeekInfo (config) {
        var w, weekYear, week, weekday, dow, doy, temp;

        w = config._w;
        if (w.GG != null || w.W != null || w.E != null) {
          dow = 1;
          doy = 4;

          // TODO: We need to take the current isoWeekYear, but that depends on
          // how we interpret now (local, utc, fixed offset). So create
          // a now version of current config (take local/utc/offset flags, and
          // create now).
          weekYear = dfl(w.GG, config._a[YEAR], weekOfYear(moment(), 1, 4).year);
          week = dfl(w.W, 1);
          weekday = dfl(w.E, 1);
        } else {
          dow = config._locale._week.dow;
          doy = config._locale._week.doy;

          weekYear = dfl(w.gg, config._a[YEAR], weekOfYear(moment(), dow, doy).year);
          week = dfl(w.w, 1);

          if (w.d != null) {
            // weekday -- low day numbers are considered next week
            weekday = w.d;
            if (weekday < dow) {
              ++week;
            }
          } else if (w.e != null) {
            // local weekday -- counting starts from begining of week
            weekday = w.e + dow;
          } else {
            // default to begining of week
            weekday = dow;
          }
        }
        temp = dayOfYearFromWeeks(weekYear, week, weekday, doy, dow);

        config._a[YEAR] = temp.year;
        config._dayOfYear = temp.dayOfYear;
      }

      // convert an array to a date.
      // the array should mirror the parameters below
      // note: all values past the year are optional and will default to the lowest possible value.
      // [year, month, day , hour, minute, second, millisecond]
      function dateFromConfig (config) {
        var i, date, input = [], currentDate, yearToUse;

        if (config._d) {
          return;
        }

        currentDate = currentDateArray(config);

        //compute day of the year from weeks and weekdays
        if (config._w && config._a[DATE] == null && config._a[MONTH] == null) {
          dayOfYearFromWeekInfo(config);
        }

        //if the day of the year is set, figure out what it is
        if (config._dayOfYear) {
          yearToUse = dfl(config._a[YEAR], currentDate[YEAR]);

          if (config._dayOfYear > daysInYear(yearToUse)) {
            config._pf._overflowDayOfYear = true;
          }

          date = makeUTCDate(yearToUse, 0, config._dayOfYear);
          config._a[MONTH] = date.getUTCMonth();
          config._a[DATE] = date.getUTCDate();
        }

        // Default to current date.
        // * if no year, month, day of month are given, default to today
        // * if day of month is given, default month and year
        // * if month is given, default only year
        // * if year is given, don't default anything
        for (i = 0; i < 3 && config._a[i] == null; ++i) {
          config._a[i] = input[i] = currentDate[i];
        }

        // Zero out whatever was not defaulted, including time
        for (; i < 7; i++) {
          config._a[i] = input[i] = (config._a[i] == null) ? (i === 2 ? 1 : 0) : config._a[i];
        }

        // Check for 24:00:00.000
        if (config._a[HOUR] === 24 &&
          config._a[MINUTE] === 0 &&
          config._a[SECOND] === 0 &&
          config._a[MILLISECOND] === 0) {
          config._nextDay = true;
          config._a[HOUR] = 0;
        }

        config._d = (config._useUTC ? makeUTCDate : makeDate).apply(null, input);
        // Apply timezone offset from input. The actual utcOffset can be changed
        // with parseZone.
        if (config._tzm != null) {
          config._d.setUTCMinutes(config._d.getUTCMinutes() - config._tzm);
        }

        if (config._nextDay) {
          config._a[HOUR] = 24;
        }
      }

      function dateFromObject (config) {
        var normalizedInput;

        if (config._d) {
          return;
        }

        normalizedInput = normalizeObjectUnits(config._i);
        config._a = [
          normalizedInput.year,
          normalizedInput.month,
          normalizedInput.day || normalizedInput.date,
          normalizedInput.hour,
          normalizedInput.minute,
          normalizedInput.second,
          normalizedInput.millisecond
        ];

        dateFromConfig(config);
      }

      function currentDateArray (config) {
        var now = new Date();
        if (config._useUTC) {
          return [
            now.getUTCFullYear(),
            now.getUTCMonth(),
            now.getUTCDate()
          ];
        } else {
          return [now.getFullYear(), now.getMonth(), now.getDate()];
        }
      }

      // date from string and format string
      function makeDateFromStringAndFormat (config) {
        if (config._f === moment.ISO_8601) {
          parseISO(config);
          return;
        }

        config._a = [];
        config._pf.empty = true;

        // This array is used to make a Date, either with `new Date` or `Date.UTC`
        var string = '' + config._i,
          i, parsedInput, tokens, token, skipped,
          stringLength = string.length,
          totalParsedInputLength = 0;

        tokens = expandFormat(config._f, config._locale).match(formattingTokens) || [];

        for (i = 0; i < tokens.length; i++) {
          token = tokens[i];
          parsedInput = (string.match(getParseRegexForToken(token, config)) || [])[0];
          if (parsedInput) {
            skipped = string.substr(0, string.indexOf(parsedInput));
            if (skipped.length > 0) {
              config._pf.unusedInput.push(skipped);
            }
            string = string.slice(string.indexOf(parsedInput) + parsedInput.length);
            totalParsedInputLength += parsedInput.length;
          }
          // don't parse if it's not a known token
          if (formatTokenFunctions[token]) {
            if (parsedInput) {
              config._pf.empty = false;
            }
            else {
              config._pf.unusedTokens.push(token);
            }
            addTimeToArrayFromToken(token, parsedInput, config);
          }
          else if (config._strict && !parsedInput) {
            config._pf.unusedTokens.push(token);
          }
        }

        // add remaining unparsed input length to the string
        config._pf.charsLeftOver = stringLength - totalParsedInputLength;
        if (string.length > 0) {
          config._pf.unusedInput.push(string);
        }

        // clear _12h flag if hour is <= 12
        if (config._pf.bigHour === true && config._a[HOUR] <= 12) {
          config._pf.bigHour = undefined;
        }
        // handle meridiem
        config._a[HOUR] = meridiemFixWrap(config._locale, config._a[HOUR],
          config._meridiem);
        dateFromConfig(config);
        checkOverflow(config);
      }

      function unescapeFormat (s) {
        return s.replace(/\\(\[)|\\(\])|\[([^\]\[]*)\]|\\(.)/g, function (matched, p1, p2, p3, p4) {
          return p1 || p2 || p3 || p4;
        });
      }

      // Code from http://stackoverflow.com/questions/3561493/is-there-a-regexp-escape-function-in-javascript
      function regexpEscape (s) {
        return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
      }

      // date from string and array of format strings
      function makeDateFromStringAndArray (config) {
        var tempConfig,
          bestMoment,

          scoreToBeat,
          i,
          currentScore;

        if (config._f.length === 0) {
          config._pf.invalidFormat = true;
          config._d = new Date(NaN);
          return;
        }

        for (i = 0; i < config._f.length; i++) {
          currentScore = 0;
          tempConfig = copyConfig({}, config);
          if (config._useUTC != null) {
            tempConfig._useUTC = config._useUTC;
          }
          tempConfig._pf = defaultParsingFlags();
          tempConfig._f = config._f[i];
          makeDateFromStringAndFormat(tempConfig);

          if (!isValid(tempConfig)) {
            continue;
          }

          // if there is any input that was not parsed add a penalty for that format
          currentScore += tempConfig._pf.charsLeftOver;

          //or tokens
          currentScore += tempConfig._pf.unusedTokens.length * 10;

          tempConfig._pf.score = currentScore;

          if (scoreToBeat == null || currentScore < scoreToBeat) {
            scoreToBeat = currentScore;
            bestMoment = tempConfig;
          }
        }

        extend(config, bestMoment || tempConfig);
      }

      // date from iso format
      function parseISO (config) {
        var i, l,
          string = config._i,
          match = isoRegex.exec(string);

        if (match) {
          config._pf.iso = true;
          for (i = 0, l = isoDates.length; i < l; i++) {
            if (isoDates[i][1].exec(string)) {
              // match[5] should be 'T' or undefined
              config._f = isoDates[i][0] + (match[6] || ' ');
              break;
            }
          }
          for (i = 0, l = isoTimes.length; i < l; i++) {
            if (isoTimes[i][1].exec(string)) {
              config._f += isoTimes[i][0];
              break;
            }
          }
          if (string.match(parseTokenTimezone)) {
            config._f += 'Z';
          }
          makeDateFromStringAndFormat(config);
        } else {
          config._isValid = false;
        }
      }

      // date from iso format or fallback
      function makeDateFromString (config) {
        parseISO(config);
        if (config._isValid === false) {
          delete config._isValid;
          moment.createFromInputFallback(config);
        }
      }

      function map (arr, fn) {
        var res = [], i;
        for (i = 0; i < arr.length; ++i) {
          res.push(fn(arr[i], i));
        }
        return res;
      }

      function makeDateFromInput (config) {
        var input = config._i, matched;
        if (input === undefined) {
          config._d = new Date();
        } else if (isDate(input)) {
          config._d = new Date(+input);
        } else if ((matched = aspNetJsonRegex.exec(input)) !== null) {
          config._d = new Date(+matched[1]);
        } else if (typeof input === 'string') {
          makeDateFromString(config);
        } else if (isArray(input)) {
          config._a = map(input.slice(0), function (obj) {
            return parseInt(obj, 10);
          });
          dateFromConfig(config);
        } else if (typeof (input) === 'object') {
          dateFromObject(config);
        } else if (typeof (input) === 'number') {
          // from milliseconds
          config._d = new Date(input);
        } else {
          moment.createFromInputFallback(config);
        }
      }

      function makeDate (y, m, d, h, M, s, ms) {
        //can't just apply() to create a date:
        //http://stackoverflow.com/questions/181348/instantiating-a-javascript-object-by-calling-prototype-constructor-apply
        var date = new Date(y, m, d, h, M, s, ms);

        //the date constructor doesn't accept years < 1970
        if (y < 1970) {
          date.setFullYear(y);
        }
        return date;
      }

      function makeUTCDate (y) {
        var date = new Date(Date.UTC.apply(null, arguments));
        if (y < 1970) {
          date.setUTCFullYear(y);
        }
        return date;
      }

      function parseWeekday (input, locale) {
        if (typeof input === 'string') {
          if (!isNaN(input)) {
            input = parseInt(input, 10);
          }
          else {
            input = locale.weekdaysParse(input);
            if (typeof input !== 'number') {
              return null;
            }
          }
        }
        return input;
      }

      /************************************
          Relative Time
      ************************************/


      // helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
      function substituteTimeAgo (string, number, withoutSuffix, isFuture, locale) {
        return locale.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
      }

      function relativeTime (posNegDuration, withoutSuffix, locale) {
        var duration = moment.duration(posNegDuration).abs(),
          seconds = round(duration.as('s')),
          minutes = round(duration.as('m')),
          hours = round(duration.as('h')),
          days = round(duration.as('d')),
          months = round(duration.as('M')),
          years = round(duration.as('y')),

          args = seconds < relativeTimeThresholds.s && ['s', seconds] ||
            minutes === 1 && ['m'] ||
            minutes < relativeTimeThresholds.m && ['mm', minutes] ||
            hours === 1 && ['h'] ||
            hours < relativeTimeThresholds.h && ['hh', hours] ||
            days === 1 && ['d'] ||
            days < relativeTimeThresholds.d && ['dd', days] ||
            months === 1 && ['M'] ||
            months < relativeTimeThresholds.M && ['MM', months] ||
            years === 1 && ['y'] || ['yy', years];

        args[2] = withoutSuffix;
        args[3] = +posNegDuration > 0;
        args[4] = locale;
        return substituteTimeAgo.apply({}, args);
      }


      /************************************
          Week of Year
      ************************************/


      // firstDayOfWeek       0 = sun, 6 = sat
      //                      the day of the week that starts the week
      //                      (usually sunday or monday)
      // firstDayOfWeekOfYear 0 = sun, 6 = sat
      //                      the first week is the week that contains the first
      //                      of this day of the week
      //                      (eg. ISO weeks use thursday (4))
      function weekOfYear (mom, firstDayOfWeek, firstDayOfWeekOfYear) {
        var end = firstDayOfWeekOfYear - firstDayOfWeek,
          daysToDayOfWeek = firstDayOfWeekOfYear - mom.day(),
          adjustedMoment;


        if (daysToDayOfWeek > end) {
          daysToDayOfWeek -= 7;
        }

        if (daysToDayOfWeek < end - 7) {
          daysToDayOfWeek += 7;
        }

        adjustedMoment = moment(mom).add(daysToDayOfWeek, 'd');
        return {
          week: Math.ceil(adjustedMoment.dayOfYear() / 7),
          year: adjustedMoment.year()
        };
      }

      //http://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
      function dayOfYearFromWeeks (year, week, weekday, firstDayOfWeekOfYear, firstDayOfWeek) {
        var d = makeUTCDate(year, 0, 1).getUTCDay(), daysToAdd, dayOfYear;

        d = d === 0 ? 7 : d;
        weekday = weekday != null ? weekday : firstDayOfWeek;
        daysToAdd = firstDayOfWeek - d + (d > firstDayOfWeekOfYear ? 7 : 0) - (d < firstDayOfWeek ? 7 : 0);
        dayOfYear = 7 * (week - 1) + (weekday - firstDayOfWeek) + daysToAdd + 1;

        return {
          year: dayOfYear > 0 ? year : year - 1,
          dayOfYear: dayOfYear > 0 ? dayOfYear : daysInYear(year - 1) + dayOfYear
        };
      }

      /************************************
          Top Level Functions
      ************************************/

      function makeMoment (config) {
        var input = config._i,
          format = config._f,
          res;

        config._locale = config._locale || moment.localeData(config._l);

        if (input === null || (format === undefined && input === '')) {
          return moment.invalid({ nullInput: true });
        }

        if (typeof input === 'string') {
          config._i = input = config._locale.preparse(input);
        }

        if (moment.isMoment(input)) {
          return new Moment(input, true);
        } else if (format) {
          if (isArray(format)) {
            makeDateFromStringAndArray(config);
          } else {
            makeDateFromStringAndFormat(config);
          }
        } else {
          makeDateFromInput(config);
        }

        res = new Moment(config);
        if (res._nextDay) {
          // Adding is smart enough around DST
          res.add(1, 'd');
          res._nextDay = undefined;
        }

        return res;
      }

      moment = function (input, format, locale, strict) {
        var c;

        if (typeof (locale) === 'boolean') {
          strict = locale;
          locale = undefined;
        }
        // object construction must be done this way.
        // https://github.com/moment/moment/issues/1423
        c = {};
        c._isAMomentObject = true;
        c._i = input;
        c._f = format;
        c._l = locale;
        c._strict = strict;
        c._isUTC = false;
        c._pf = defaultParsingFlags();

        return makeMoment(c);
      };

      moment.suppressDeprecationWarnings = false;

      moment.createFromInputFallback = deprecate(
        'moment construction falls back to js Date. This is ' +
        'discouraged and will be removed in upcoming major ' +
        'release. Please refer to ' +
        'https://github.com/moment/moment/issues/1407 for more info.',
        function (config) {
          config._d = new Date(config._i + (config._useUTC ? ' UTC' : ''));
        }
      );

      // Pick a moment m from moments so that m[fn](other) is true for all
      // other. This relies on the function fn to be transitive.
      //
      // moments should either be an array of moment objects or an array, whose
      // first element is an array of moment objects.
      function pickBy (fn, moments) {
        var res, i;
        if (moments.length === 1 && isArray(moments[0])) {
          moments = moments[0];
        }
        if (!moments.length) {
          return moment();
        }
        res = moments[0];
        for (i = 1; i < moments.length; ++i) {
          if (moments[i][fn](res)) {
            res = moments[i];
          }
        }
        return res;
      }

      moment.min = function () {
        var args = [].slice.call(arguments, 0);

        return pickBy('isBefore', args);
      };

      moment.max = function () {
        var args = [].slice.call(arguments, 0);

        return pickBy('isAfter', args);
      };

      // creating with utc
      moment.utc = function (input, format, locale, strict) {
        var c;

        if (typeof (locale) === 'boolean') {
          strict = locale;
          locale = undefined;
        }
        // object construction must be done this way.
        // https://github.com/moment/moment/issues/1423
        c = {};
        c._isAMomentObject = true;
        c._useUTC = true;
        c._isUTC = true;
        c._l = locale;
        c._i = input;
        c._f = format;
        c._strict = strict;
        c._pf = defaultParsingFlags();

        return makeMoment(c).utc();
      };

      // creating with unix timestamp (in seconds)
      moment.unix = function (input) {
        return moment(input * 1000);
      };

      // duration
      moment.duration = function (input, key) {
        var duration = input,
          // matching against regexp is expensive, do it on demand
          match = null,
          sign,
          ret,
          parseIso,
          diffRes;

        if (moment.isDuration(input)) {
          duration = {
            ms: input._milliseconds,
            d: input._days,
            M: input._months
          };
        } else if (typeof input === 'number') {
          duration = {};
          if (key) {
            duration[key] = input;
          } else {
            duration.milliseconds = input;
          }
        } else if (!!(match = aspNetTimeSpanJsonRegex.exec(input))) {
          sign = (match[1] === '-') ? -1 : 1;
          duration = {
            y: 0,
            d: toInt(match[DATE]) * sign,
            h: toInt(match[HOUR]) * sign,
            m: toInt(match[MINUTE]) * sign,
            s: toInt(match[SECOND]) * sign,
            ms: toInt(match[MILLISECOND]) * sign
          };
        } else if (!!(match = isoDurationRegex.exec(input))) {
          sign = (match[1] === '-') ? -1 : 1;
          parseIso = function (inp) {
            // We'd normally use ~~inp for this, but unfortunately it also
            // converts floats to ints.
            // inp may be undefined, so careful calling replace on it.
            var res = inp && parseFloat(inp.replace(',', '.'));
            // apply sign while we're at it
            return (isNaN(res) ? 0 : res) * sign;
          };
          duration = {
            y: parseIso(match[2]),
            M: parseIso(match[3]),
            d: parseIso(match[4]),
            h: parseIso(match[5]),
            m: parseIso(match[6]),
            s: parseIso(match[7]),
            w: parseIso(match[8])
          };
        } else if (duration == null) {// checks for null or undefined
          duration = {};
        } else if (typeof duration === 'object' &&
          ('from' in duration || 'to' in duration)) {
          diffRes = momentsDifference(moment(duration.from), moment(duration.to));

          duration = {};
          duration.ms = diffRes.milliseconds;
          duration.M = diffRes.months;
        }

        ret = new Duration(duration);

        if (moment.isDuration(input) && hasOwnProp(input, '_locale')) {
          ret._locale = input._locale;
        }

        return ret;
      };

      // version number
      moment.version = VERSION;

      // default format
      moment.defaultFormat = isoFormat;

      // constant that refers to the ISO standard
      moment.ISO_8601 = function () { };

      // Plugins that add properties should also add the key here (null value),
      // so we can properly clone ourselves.
      moment.momentProperties = momentProperties;

      // This function will be called whenever a moment is mutated.
      // It is intended to keep the offset in sync with the timezone.
      moment.updateOffset = function () { };

      // This function allows you to set a threshold for relative time strings
      moment.relativeTimeThreshold = function (threshold, limit) {
        if (relativeTimeThresholds[threshold] === undefined) {
          return false;
        }
        if (limit === undefined) {
          return relativeTimeThresholds[threshold];
        }
        relativeTimeThresholds[threshold] = limit;
        return true;
      };

      moment.lang = deprecate(
        'moment.lang is deprecated. Use moment.locale instead.',
        function (key, value) {
          return moment.locale(key, value);
        }
      );

      // This function will load locale and then set the global locale.  If
      // no arguments are passed in, it will simply return the current global
      // locale key.
      moment.locale = function (key, values) {
        var data;
        if (key) {
          if (typeof (values) !== 'undefined') {
            data = moment.defineLocale(key, values);
          }
          else {
            data = moment.localeData(key);
          }

          if (data) {
            moment.duration._locale = moment._locale = data;
          }
        }

        return moment._locale._abbr;
      };

      moment.defineLocale = function (name, values) {
        if (values !== null) {
          values.abbr = name;
          if (!locales[name]) {
            locales[name] = new Locale();
          }
          locales[name].set(values);

          // backwards compat for now: also set the locale
          moment.locale(name);

          return locales[name];
        } else {
          // useful for testing
          delete locales[name];
          return null;
        }
      };

      moment.langData = deprecate(
        'moment.langData is deprecated. Use moment.localeData instead.',
        function (key) {
          return moment.localeData(key);
        }
      );

      // returns locale data
      moment.localeData = function (key) {
        var locale;

        if (key && key._locale && key._locale._abbr) {
          key = key._locale._abbr;
        }

        if (!key) {
          return moment._locale;
        }

        if (!isArray(key)) {
          //short-circuit everything else
          locale = loadLocale(key);
          if (locale) {
            return locale;
          }
          key = [key];
        }

        return chooseLocale(key);
      };

      // compare moment object
      moment.isMoment = function (obj) {
        return obj instanceof Moment ||
          (obj != null && hasOwnProp(obj, '_isAMomentObject'));
      };

      // for typechecking Duration objects
      moment.isDuration = function (obj) {
        return obj instanceof Duration;
      };

      for (i = lists.length - 1; i >= 0; --i) {
        makeList(lists[i]);
      }

      moment.normalizeUnits = function (units) {
        return normalizeUnits(units);
      };

      moment.invalid = function (flags) {
        var m = moment.utc(NaN);
        if (flags != null) {
          extend(m._pf, flags);
        }
        else {
          m._pf.userInvalidated = true;
        }

        return m;
      };

      moment.parseZone = function () {
        return moment.apply(null, arguments).parseZone();
      };

      moment.parseTwoDigitYear = function (input) {
        return toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
      };

      moment.isDate = isDate;

      /************************************
          Moment Prototype
      ************************************/


      extend(moment.fn = Moment.prototype, {

        clone: function () {
          return moment(this);
        },

        valueOf: function () {
          return +this._d - ((this._offset || 0) * 60000);
        },

        unix: function () {
          return Math.floor(+this / 1000);
        },

        toString: function () {
          return this.clone().locale('en').format('ddd MMM DD YYYY HH:mm:ss [GMT]ZZ');
        },

        toDate: function () {
          return this._offset ? new Date(+this) : this._d;
        },

        toISOString: function () {
          var m = moment(this).utc();
          if (0 < m.year() && m.year() <= 9999) {
            if ('function' === typeof Date.prototype.toISOString) {
              // native implementation is ~50x faster, use it when we can
              return this.toDate().toISOString();
            } else {
              return formatMoment(m, 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
            }
          } else {
            return formatMoment(m, 'YYYYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
          }
        },

        toArray: function () {
          var m = this;
          return [
            m.year(),
            m.month(),
            m.date(),
            m.hours(),
            m.minutes(),
            m.seconds(),
            m.milliseconds()
          ];
        },

        isValid: function () {
          return isValid(this);
        },

        isDSTShifted: function () {
          if (this._a) {
            return this.isValid() && compareArrays(this._a, (this._isUTC ? moment.utc(this._a) : moment(this._a)).toArray()) > 0;
          }

          return false;
        },

        parsingFlags: function () {
          return extend({}, this._pf);
        },

        invalidAt: function () {
          return this._pf.overflow;
        },

        utc: function (keepLocalTime) {
          return this.utcOffset(0, keepLocalTime);
        },

        local: function (keepLocalTime) {
          if (this._isUTC) {
            this.utcOffset(0, keepLocalTime);
            this._isUTC = false;

            if (keepLocalTime) {
              this.subtract(this._dateUtcOffset(), 'm');
            }
          }
          return this;
        },

        format: function (inputString) {
          var output = formatMoment(this, inputString || moment.defaultFormat);
          return this.localeData().postformat(output);
        },

        add: createAdder(1, 'add'),

        subtract: createAdder(-1, 'subtract'),

        diff: function (input, units, asFloat) {
          var that = makeAs(input, this),
            zoneDiff = (that.utcOffset() - this.utcOffset()) * 6e4,
            anchor, diff, output, daysAdjust;

          units = normalizeUnits(units);

          if (units === 'year' || units === 'month' || units === 'quarter') {
            output = monthDiff(this, that);
            if (units === 'quarter') {
              output = output / 3;
            } else if (units === 'year') {
              output = output / 12;
            }
          } else {
            diff = this - that;
            output = units === 'second' ? diff / 1e3 : // 1000
              units === 'minute' ? diff / 6e4 : // 1000 * 60
                units === 'hour' ? diff / 36e5 : // 1000 * 60 * 60
                  units === 'day' ? (diff - zoneDiff) / 864e5 : // 1000 * 60 * 60 * 24, negate dst
                    units === 'week' ? (diff - zoneDiff) / 6048e5 : // 1000 * 60 * 60 * 24 * 7, negate dst
                      diff;
          }
          return asFloat ? output : absRound(output);
        },

        from: function (time, withoutSuffix) {
          return moment.duration({ to: this, from: time }).locale(this.locale()).humanize(!withoutSuffix);
        },

        fromNow: function (withoutSuffix) {
          return this.from(moment(), withoutSuffix);
        },

        calendar: function (time) {
          // We want to compare the start of today, vs this.
          // Getting start-of-today depends on whether we're locat/utc/offset
          // or not.
          var now = time || moment(),
            sod = makeAs(now, this).startOf('day'),
            diff = this.diff(sod, 'days', true),
            format = diff < -6 ? 'sameElse' :
              diff < -1 ? 'lastWeek' :
                diff < 0 ? 'lastDay' :
                  diff < 1 ? 'sameDay' :
                    diff < 2 ? 'nextDay' :
                      diff < 7 ? 'nextWeek' : 'sameElse';
          return this.format(this.localeData().calendar(format, this, moment(now)));
        },

        isLeapYear: function () {
          return isLeapYear(this.year());
        },

        isDST: function () {
          return (this.utcOffset() > this.clone().month(0).utcOffset() ||
            this.utcOffset() > this.clone().month(5).utcOffset());
        },

        day: function (input) {
          var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
          if (input != null) {
            input = parseWeekday(input, this.localeData());
            return this.add(input - day, 'd');
          } else {
            return day;
          }
        },

        month: makeAccessor('Month', true),

        startOf: function (units) {
          units = normalizeUnits(units);
          // the following switch intentionally omits break keywords
          // to utilize falling through the cases.
          switch (units) {
            case 'year':
              this.month(0);
            /* falls through */
            case 'quarter':
            case 'month':
              this.date(1);
            /* falls through */
            case 'week':
            case 'isoWeek':
            case 'day':
              this.hours(0);
            /* falls through */
            case 'hour':
              this.minutes(0);
            /* falls through */
            case 'minute':
              this.seconds(0);
            /* falls through */
            case 'second':
              this.milliseconds(0);
            /* falls through */
          }

          // weeks are a special case
          if (units === 'week') {
            this.weekday(0);
          } else if (units === 'isoWeek') {
            this.isoWeekday(1);
          }

          // quarters are also special
          if (units === 'quarter') {
            this.month(Math.floor(this.month() / 3) * 3);
          }

          return this;
        },

        endOf: function (units) {
          units = normalizeUnits(units);
          if (units === undefined || units === 'millisecond') {
            return this;
          }
          return this.startOf(units).add(1, (units === 'isoWeek' ? 'week' : units)).subtract(1, 'ms');
        },

        isAfter: function (input, units) {
          var inputMs;
          units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
          if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this > +input;
          } else {
            inputMs = moment.isMoment(input) ? +input : +moment(input);
            return inputMs < +this.clone().startOf(units);
          }
        },

        isBefore: function (input, units) {
          var inputMs;
          units = normalizeUnits(typeof units !== 'undefined' ? units : 'millisecond');
          if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this < +input;
          } else {
            inputMs = moment.isMoment(input) ? +input : +moment(input);
            return +this.clone().endOf(units) < inputMs;
          }
        },

        isBetween: function (from, to, units) {
          return this.isAfter(from, units) && this.isBefore(to, units);
        },

        isSame: function (input, units) {
          var inputMs;
          units = normalizeUnits(units || 'millisecond');
          if (units === 'millisecond') {
            input = moment.isMoment(input) ? input : moment(input);
            return +this === +input;
          } else {
            inputMs = +moment(input);
            return +(this.clone().startOf(units)) <= inputMs && inputMs <= +(this.clone().endOf(units));
          }
        },

        min: deprecate(
          'moment().min is deprecated, use moment.min instead. https://github.com/moment/moment/issues/1548',
          function (other) {
            other = moment.apply(null, arguments);
            return other < this ? this : other;
          }
        ),

        max: deprecate(
          'moment().max is deprecated, use moment.max instead. https://github.com/moment/moment/issues/1548',
          function (other) {
            other = moment.apply(null, arguments);
            return other > this ? this : other;
          }
        ),

        zone: deprecate(
          'moment().zone is deprecated, use moment().utcOffset instead. ' +
          'https://github.com/moment/moment/issues/1779',
          function (input, keepLocalTime) {
            if (input != null) {
              if (typeof input !== 'string') {
                input = -input;
              }

              this.utcOffset(input, keepLocalTime);

              return this;
            } else {
              return -this.utcOffset();
            }
          }
        ),

        // keepLocalTime = true means only change the timezone, without
        // affecting the local hour. So 5:31:26 +0300 --[utcOffset(2, true)]-->
        // 5:31:26 +0200 It is possible that 5:31:26 doesn't exist with offset
        // +0200, so we adjust the time as needed, to be valid.
        //
        // Keeping the time actually adds/subtracts (one hour)
        // from the actual represented time. That is why we call updateOffset
        // a second time. In case it wants us to change the offset again
        // _changeInProgress == true case, then we have to adjust, because
        // there is no such time in the given timezone.
        utcOffset: function (input, keepLocalTime) {
          var offset = this._offset || 0,
            localAdjust;
          if (input != null) {
            if (typeof input === 'string') {
              input = utcOffsetFromString(input);
            }
            if (Math.abs(input) < 16) {
              input = input * 60;
            }
            if (!this._isUTC && keepLocalTime) {
              localAdjust = this._dateUtcOffset();
            }
            this._offset = input;
            this._isUTC = true;
            if (localAdjust != null) {
              this.add(localAdjust, 'm');
            }
            if (offset !== input) {
              if (!keepLocalTime || this._changeInProgress) {
                addOrSubtractDurationFromMoment(this,
                  moment.duration(input - offset, 'm'), 1, false);
              } else if (!this._changeInProgress) {
                this._changeInProgress = true;
                moment.updateOffset(this, true);
                this._changeInProgress = null;
              }
            }

            return this;
          } else {
            return this._isUTC ? offset : this._dateUtcOffset();
          }
        },

        isLocal: function () {
          return !this._isUTC;
        },

        isUtcOffset: function () {
          return this._isUTC;
        },

        isUtc: function () {
          return this._isUTC && this._offset === 0;
        },

        zoneAbbr: function () {
          return this._isUTC ? 'UTC' : '';
        },

        zoneName: function () {
          return this._isUTC ? 'Coordinated Universal Time' : '';
        },

        parseZone: function () {
          if (this._tzm) {
            this.utcOffset(this._tzm);
          } else if (typeof this._i === 'string') {
            this.utcOffset(utcOffsetFromString(this._i));
          }
          return this;
        },

        hasAlignedHourOffset: function (input) {
          if (!input) {
            input = 0;
          }
          else {
            input = moment(input).utcOffset();
          }

          return (this.utcOffset() - input) % 60 === 0;
        },

        daysInMonth: function () {
          return daysInMonth(this.year(), this.month());
        },

        dayOfYear: function (input) {
          var dayOfYear = round((moment(this).startOf('day') - moment(this).startOf('year')) / 864e5) + 1;
          return input == null ? dayOfYear : this.add((input - dayOfYear), 'd');
        },

        quarter: function (input) {
          return input == null ? Math.ceil((this.month() + 1) / 3) : this.month((input - 1) * 3 + this.month() % 3);
        },

        weekYear: function (input) {
          var year = weekOfYear(this, this.localeData()._week.dow, this.localeData()._week.doy).year;
          return input == null ? year : this.add((input - year), 'y');
        },

        isoWeekYear: function (input) {
          var year = weekOfYear(this, 1, 4).year;
          return input == null ? year : this.add((input - year), 'y');
        },

        week: function (input) {
          var week = this.localeData().week(this);
          return input == null ? week : this.add((input - week) * 7, 'd');
        },

        isoWeek: function (input) {
          var week = weekOfYear(this, 1, 4).week;
          return input == null ? week : this.add((input - week) * 7, 'd');
        },

        weekday: function (input) {
          var weekday = (this.day() + 7 - this.localeData()._week.dow) % 7;
          return input == null ? weekday : this.add(input - weekday, 'd');
        },

        isoWeekday: function (input) {
          // behaves the same as moment#day except
          // as a getter, returns 7 instead of 0 (1-7 range instead of 0-6)
          // as a setter, sunday should belong to the previous week.
          return input == null ? this.day() || 7 : this.day(this.day() % 7 ? input : input - 7);
        },

        isoWeeksInYear: function () {
          return weeksInYear(this.year(), 1, 4);
        },

        weeksInYear: function () {
          var weekInfo = this.localeData()._week;
          return weeksInYear(this.year(), weekInfo.dow, weekInfo.doy);
        },

        get: function (units) {
          units = normalizeUnits(units);
          return this[units]();
        },

        set: function (units, value) {
          var unit;
          if (typeof units === 'object') {
            for (unit in units) {
              this.set(unit, units[unit]);
            }
          }
          else {
            units = normalizeUnits(units);
            if (typeof this[units] === 'function') {
              this[units](value);
            }
          }
          return this;
        },

        // If passed a locale key, it will set the locale for this
        // instance.  Otherwise, it will return the locale configuration
        // variables for this instance.
        locale: function (key) {
          var newLocaleData;

          if (key === undefined) {
            return this._locale._abbr;
          } else {
            newLocaleData = moment.localeData(key);
            if (newLocaleData != null) {
              this._locale = newLocaleData;
            }
            return this;
          }
        },

        lang: deprecate(
          'moment().lang() is deprecated. Instead, use moment().localeData() to get the language configuration. Use moment().locale() to change languages.',
          function (key) {
            if (key === undefined) {
              return this.localeData();
            } else {
              return this.locale(key);
            }
          }
        ),

        localeData: function () {
          return this._locale;
        },

        _dateUtcOffset: function () {
          // On Firefox.24 Date#getTimezoneOffset returns a floating point.
          // https://github.com/moment/moment/pull/1871
          return -Math.round(this._d.getTimezoneOffset() / 15) * 15;
        }

      });

      function rawMonthSetter (mom, value) {
        var dayOfMonth;

        // TODO: Move this out of here!
        if (typeof value === 'string') {
          value = mom.localeData().monthsParse(value);
          // TODO: Another silent failure?
          if (typeof value !== 'number') {
            return mom;
          }
        }

        dayOfMonth = Math.min(mom.date(),
          daysInMonth(mom.year(), value));
        mom._d['set' + (mom._isUTC ? 'UTC' : '') + 'Month'](value, dayOfMonth);
        return mom;
      }

      function rawGetter (mom, unit) {
        return mom._d['get' + (mom._isUTC ? 'UTC' : '') + unit]();
      }

      function rawSetter (mom, unit, value) {
        if (unit === 'Month') {
          return rawMonthSetter(mom, value);
        } else {
          return mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](value);
        }
      }

      function makeAccessor (unit, keepTime) {
        return function (value) {
          if (value != null) {
            rawSetter(this, unit, value);
            moment.updateOffset(this, keepTime);
            return this;
          } else {
            return rawGetter(this, unit);
          }
        };
      }

      moment.fn.millisecond = moment.fn.milliseconds = makeAccessor('Milliseconds', false);
      moment.fn.second = moment.fn.seconds = makeAccessor('Seconds', false);
      moment.fn.minute = moment.fn.minutes = makeAccessor('Minutes', false);
      // Setting the hour should keep the time, because the user explicitly
      // specified which hour he wants. So trying to maintain the same hour (in
      // a new timezone) makes sense. Adding/subtracting hours does not follow
      // this rule.
      moment.fn.hour = moment.fn.hours = makeAccessor('Hours', true);
      // moment.fn.month is defined separately
      moment.fn.date = makeAccessor('Date', true);
      moment.fn.dates = deprecate('dates accessor is deprecated. Use date instead.', makeAccessor('Date', true));
      moment.fn.year = makeAccessor('FullYear', true);
      moment.fn.years = deprecate('years accessor is deprecated. Use year instead.', makeAccessor('FullYear', true));

      // add plural methods
      moment.fn.days = moment.fn.day;
      moment.fn.months = moment.fn.month;
      moment.fn.weeks = moment.fn.week;
      moment.fn.isoWeeks = moment.fn.isoWeek;
      moment.fn.quarters = moment.fn.quarter;

      // add aliased format methods
      moment.fn.toJSON = moment.fn.toISOString;

      // alias isUtc for dev-friendliness
      moment.fn.isUTC = moment.fn.isUtc;

      /************************************
          Duration Prototype
      ************************************/


      function daysToYears (days) {
        // 400 years have 146097 days (taking into account leap year rules)
        return days * 400 / 146097;
      }

      function yearsToDays (years) {
        // years * 365 + absRound(years / 4) -
        //     absRound(years / 100) + absRound(years / 400);
        return years * 146097 / 400;
      }

      extend(moment.duration.fn = Duration.prototype, {

        _bubble: function () {
          var milliseconds = this._milliseconds,
            days = this._days,
            months = this._months,
            data = this._data,
            seconds, minutes, hours, years = 0;

          // The following code bubbles up values, see the tests for
          // examples of what that means.
          data.milliseconds = milliseconds % 1000;

          seconds = absRound(milliseconds / 1000);
          data.seconds = seconds % 60;

          minutes = absRound(seconds / 60);
          data.minutes = minutes % 60;

          hours = absRound(minutes / 60);
          data.hours = hours % 24;

          days += absRound(hours / 24);

          // Accurately convert days to years, assume start from year 0.
          years = absRound(daysToYears(days));
          days -= absRound(yearsToDays(years));

          // 30 days to a month
          // TODO (iskren): Use anchor date (like 1st Jan) to compute this.
          months += absRound(days / 30);
          days %= 30;

          // 12 months -> 1 year
          years += absRound(months / 12);
          months %= 12;

          data.days = days;
          data.months = months;
          data.years = years;
        },

        abs: function () {
          this._milliseconds = Math.abs(this._milliseconds);
          this._days = Math.abs(this._days);
          this._months = Math.abs(this._months);

          this._data.milliseconds = Math.abs(this._data.milliseconds);
          this._data.seconds = Math.abs(this._data.seconds);
          this._data.minutes = Math.abs(this._data.minutes);
          this._data.hours = Math.abs(this._data.hours);
          this._data.months = Math.abs(this._data.months);
          this._data.years = Math.abs(this._data.years);

          return this;
        },

        weeks: function () {
          return absRound(this.days() / 7);
        },

        valueOf: function () {
          return this._milliseconds +
            this._days * 864e5 +
            (this._months % 12) * 2592e6 +
            toInt(this._months / 12) * 31536e6;
        },

        humanize: function (withSuffix) {
          var output = relativeTime(this, !withSuffix, this.localeData());

          if (withSuffix) {
            output = this.localeData().pastFuture(+this, output);
          }

          return this.localeData().postformat(output);
        },

        add: function (input, val) {
          // supports only 2.0-style add(1, 's') or add(moment)
          var dur = moment.duration(input, val);

          this._milliseconds += dur._milliseconds;
          this._days += dur._days;
          this._months += dur._months;

          this._bubble();

          return this;
        },

        subtract: function (input, val) {
          var dur = moment.duration(input, val);

          this._milliseconds -= dur._milliseconds;
          this._days -= dur._days;
          this._months -= dur._months;

          this._bubble();

          return this;
        },

        get: function (units) {
          units = normalizeUnits(units);
          return this[units.toLowerCase() + 's']();
        },

        as: function (units) {
          var days, months;
          units = normalizeUnits(units);

          if (units === 'month' || units === 'year') {
            days = this._days + this._milliseconds / 864e5;
            months = this._months + daysToYears(days) * 12;
            return units === 'month' ? months : months / 12;
          } else {
            // handle milliseconds separately because of floating point math errors (issue #1867)
            days = this._days + Math.round(yearsToDays(this._months / 12));
            switch (units) {
              case 'week': return days / 7 + this._milliseconds / 6048e5;
              case 'day': return days + this._milliseconds / 864e5;
              case 'hour': return days * 24 + this._milliseconds / 36e5;
              case 'minute': return days * 24 * 60 + this._milliseconds / 6e4;
              case 'second': return days * 24 * 60 * 60 + this._milliseconds / 1000;
              // Math.floor prevents floating point math errors here
              case 'millisecond': return Math.floor(days * 24 * 60 * 60 * 1000) + this._milliseconds;
              default: throw new Error('Unknown unit ' + units);
            }
          }
        },

        lang: moment.fn.lang,
        locale: moment.fn.locale,

        toIsoString: deprecate(
          'toIsoString() is deprecated. Please use toISOString() instead ' +
          '(notice the capitals)',
          function () {
            return this.toISOString();
          }
        ),

        toISOString: function () {
          // inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
          var years = Math.abs(this.years()),
            months = Math.abs(this.months()),
            days = Math.abs(this.days()),
            hours = Math.abs(this.hours()),
            minutes = Math.abs(this.minutes()),
            seconds = Math.abs(this.seconds() + this.milliseconds() / 1000);

          if (!this.asSeconds()) {
            // this is the same as C#'s (Noda) and python (isodate)...
            // but not other JS (goog.date)
            return 'P0D';
          }

          return (this.asSeconds() < 0 ? '-' : '') +
            'P' +
            (years ? years + 'Y' : '') +
            (months ? months + 'M' : '') +
            (days ? days + 'D' : '') +
            ((hours || minutes || seconds) ? 'T' : '') +
            (hours ? hours + 'H' : '') +
            (minutes ? minutes + 'M' : '') +
            (seconds ? seconds + 'S' : '');
        },

        localeData: function () {
          return this._locale;
        },

        toJSON: function () {
          return this.toISOString();
        }
      });

      moment.duration.fn.toString = moment.duration.fn.toISOString;

      function makeDurationGetter (name) {
        moment.duration.fn[name] = function () {
          return this._data[name];
        };
      }

      for (i in unitMillisecondFactors) {
        if (hasOwnProp(unitMillisecondFactors, i)) {
          makeDurationGetter(i.toLowerCase());
        }
      }

      moment.duration.fn.asMilliseconds = function () {
        return this.as('ms');
      };
      moment.duration.fn.asSeconds = function () {
        return this.as('s');
      };
      moment.duration.fn.asMinutes = function () {
        return this.as('m');
      };
      moment.duration.fn.asHours = function () {
        return this.as('h');
      };
      moment.duration.fn.asDays = function () {
        return this.as('d');
      };
      moment.duration.fn.asWeeks = function () {
        return this.as('weeks');
      };
      moment.duration.fn.asMonths = function () {
        return this.as('M');
      };
      moment.duration.fn.asYears = function () {
        return this.as('y');
      };

      /************************************
          Default Locale
      ************************************/


      // Set default locale, other locale will inherit from English.
      moment.locale('en', {
        ordinalParse: /\d{1,2}(th|st|nd|rd)/,
        ordinal: function (number) {
          var b = number % 10,
            output = (toInt(number % 100 / 10) === 1) ? 'th' :
              (b === 1) ? 'st' :
                (b === 2) ? 'nd' :
                  (b === 3) ? 'rd' : 'th';
          return number + output;
        }
      });

      /* EMBED_LOCALES */

      /************************************
          Exposing Moment
      ************************************/

      globalScope.moment = moment;
    }).call(Kalendae);
    if (typeof moment !== 'undefined') {
      Kalendae.moment = moment;
    }

    if (!Kalendae.moment) {
      if (window.moment) {
        Kalendae.moment = window.moment;
      } else {
        throw "Kalendae requires moment.js. You must use kalendae.standalone.js if moment is not available on the page.";
      }
    }

    moment = Kalendae.moment;

    //function to get the total number of days since the epoch.
    moment.fn.yearDay = function (input) {
      var yearday = Math.floor(this._d / 86400000);
      return (typeof input === 'undefined') ? yearday :
        this.add({ d: input - yearday });
    };
    if (typeof jQuery !== 'undefined' && (typeof document.addEventListener === 'function' || util.isIE8())) {
      jQuery.fn.kalendae = function (options) {
        this.each(function (i, e) {
          if (e.tagName === 'INPUT') {
            //if element is an input, bind a popup calendar to the input.
            jQuery(e).data('kalendae', new Kalendae.Input(e, options));
          } else {
            //otherwise, insert a flat calendar into the element.
            jQuery(e).data('kalendae', new Kalendae(jQuery.extend({}, { attachTo: e }, options)));
          }
        });
        return this;
      };
    }

    return Kalendae;
  }));

})();
